| 单词 | radiocarbon |
| 例句 | When those radiocarbon dates were announced in 1960, not even Japanese scientists could at first believe them. Guns, Germs, and Steel: The Fates of Human Societies 1997-03-01T00:00:00Z In an attempt to reduce confusion, all dates in this book are ordinary calendar dates—that is, radiocarbon dates corrected by the most recent calibration. 1491 2005-10-10T00:00:00Z Willard Libby was in the process of inventing radiocarbon dating, allowing scientists to get an accurate reading of the age of bones and other organic remains, something they had never been able to do before. A Short History of Nearly Everything 2003-05-06T00:00:00Z In this way, measured radiocarbon dates can be “calibrated” to take account of fluctuations in the atmospheric carbon ratio. Guns, Germs, and Steel: The Fates of Human Societies 1997-03-01T00:00:00Z Are the reported radiocarbon dates really correct, and not invalidated by any of the numerous difficulties that can plague radiocarbon dating? Guns, Germs, and Steel: The Fates of Human Societies 1997-03-01T00:00:00Z Throughout this book, dates for about the last 15,000 years will be quoted as so-called calibrated radiocarbon dates, rather than as conventional, uncalibrated radiocarbon dates. Guns, Germs, and Steel: The Fates of Human Societies 1997-03-01T00:00:00Z He had enough grant money to pay for seven radiocarbon dates. 1491 2005-10-10T00:00:00Z With radiocarbon, these numbers, these ancient ages, could be known, and with ever-increasing accuracy. 1491 2005-10-10T00:00:00Z Amazed by what Shady had found, they proposed using their funds to conduct some radiocarbon tests on samples from Caral. 1491 2005-10-10T00:00:00Z Archaeologists date food production by radiocarbon dating of carbon-containing materials at the site. Guns, Germs, and Steel: The Fates of Human Societies 1997-03-01T00:00:00Z In addition, they came upon supposed hearths, whose burnt charcoal yielded radiocarbon dates of around 35,000 years ago. Guns, Germs, and Steel: The Fates of Human Societies 1997-03-01T00:00:00Z This is radiocarbon and chemically identical to normal carbon. Bones from a Cheddar Gorge cave show that cannibalism helped Britain's earliest settlers survive the ice age 2010-06-19T23:05:00Z We await the results of radiocarbon dating – expected early next year - eagerly in the hope of getting a more precise fix on the period of use. Fresh insights from the UK's oldest museum of Roman remains 2012-08-15T07:00:00Z Researchers conducted a battery of scientific tests, including radiocarbon dating to determine the skeleton's age. Experts find remains of England's King Richard III 2013-02-04T14:07:03Z "The problem with radiocarbon dates of this antiquity is that it only takes a tiny trace of contamination from modern organic material to distort results," said Higham. Bones from a Cheddar Gorge cave show that cannibalism helped Britain's earliest settlers survive the ice age 2010-06-19T23:05:00Z He probably lectured us about radiocarbon dating and the elemental composition of enamel, about paleoclimates and C3/C4 plant material, but if so, I missed it, because I was already running calculations. The Season of the Skulls 2016-09-20T04:00:00Z She was about 15, but her skeleton hasn't yet been subjected to radiocarbon dating or isotopic analysis. UK experts find 7th-century teen buried in her bed 2012-03-16T17:51:10Z Dipesh Chakrabarty, a historian at the University of Chicago, who has seen the book, said that since historians are not those who do the radiocarbon dating or the genetic analysis, they won’t be making discoveries. ?Deep History? Takes Humanity Back to Its Origins 2011-09-26T22:30:59Z Perfected by scientists based at Oxford University's radiocarbon accelerator unit, it allows researchers to pinpoint the ages of ancient bones and other organic material with unprecedented accuracy. Bones from a Cheddar Gorge cave show that cannibalism helped Britain's earliest settlers survive the ice age 2010-06-19T23:05:00Z Mr. Herzog doesn’t address the conflict, which partly turns on whether the radiocarbon dating was sufficient, but then again, he isn’t a journalist. | 'Cave of Forgotten Dreams': Herzog Finds His Inner Cave Man 2011-04-28T21:43:04Z The researchers examined remains at the Curracurrang archaeological site, south of Sydney, where radiocarbon dating of dingo bones revealed the animals were buried alongside humans as far back as 2,000 years ago. Dingoes given 'almost-human' status in pre-colonial Australia 2023-10-20T04:00:00Z And radiocarbon dating of the naturally mummified mice showed they lived no more than 350 years ago—long after the Incas stopped visiting the summit. Mice thrive at 6700 kilometers up—higher than any mammals were thought able to live 2023-10-23T04:00:00Z They soon discovered a strange excess in radiocarbon dated to 14,300 years ago. Traces of Oldest and Largest Solar Storm Found in Buried French Forest 2023-10-19T04:00:00Z Specifically, the scientists compared a radiocarbon spike in those ancient tree rings with measurements of beryllium, an element found in Greenland ice cores that likewise provide records of ancient solar activity. A solar storm from 14,300 years ago previews how Earth may one day plunge into darkness 2023-10-19T04:00:00Z An international team of scientists have discovered a huge spike in radiocarbon levels 14,300 years ago by analysing ancient tree-rings found in the French Alps. Researchers identify largest ever solar storm in ancient 14,300-year-old tree rings 2023-10-09T04:00:00Z Using this method, they found that quartz samples collected within the footprint-bearing layers had a minimum age of ~21,500 years, providing further support to the radiocarbon results. Oldest fossil human footprints in North America confirmed 2023-10-05T04:00:00Z In the new study, the researchers determined the radiocarbon age of microscopic pollen grains in the sediment layers, which hadn’t grown in the lake water. Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z The 2021 study dated the footprints using radiocarbon dating to determine the age of seeds of a common aquatic plant called spiral ditchgrass found alongside the fossilized foot impressions. New tests confirm antiquity of ancient human footprints in New Mexico 2023-10-05T04:00:00Z The end result was the radiocarbon spikes observed in the tree rings. A solar storm from 14,300 years ago previews how Earth may one day plunge into darkness 2023-10-19T04:00:00Z The radiocarbon spike was caused by a massive solar storm, the biggest ever identified. Researchers identify largest ever solar storm in ancient 14,300-year-old tree rings 2023-10-09T04:00:00Z The controversy centered on the accuracy of the original ages, which were obtained by radiocarbon dating. Oldest fossil human footprints in North America confirmed 2023-10-05T04:00:00Z They then measured the almost imperceptible glow of quartz grains in the samples under specific frequencies of light, and the resulting dates matched those from the radiocarbon method, he says. Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z This time, the researchers used radiocarbon dating on conifer pollen, avoiding any concerns about aquatic plants. New tests confirm antiquity of ancient human footprints in New Mexico 2023-10-05T04:00:00Z In the team’s first paper, the researchers radiocarbon dated seeds from a grassy aquatic plant called Ruppia cirrhosa, which were embedded in layers of earth between the footprints. New footprint dates bolster claim that humans lived in Americas during Ice Age 2023-10-04T04:00:00Z Analysis of these individual rings identified an unprecedented spike in radiocarbon levels occurring precisely 14,300 years ago. Researchers identify largest ever solar storm in ancient 14,300-year-old tree rings 2023-10-09T04:00:00Z For their follow-up study, the researchers focused on radiocarbon dating of conifer pollen, because it comes from terrestrial plants and therefore avoids potential issues that arise when dating aquatic plants like Ruppia. Oldest fossil human footprints in North America confirmed 2023-10-05T04:00:00Z The work confirms a 2021 study’s findings, which were based on radiocarbon dates from aquatic plant seeds in the sediments. Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z Researchers can analyze well-preserved DNA from an ear bone for as little as a few hundred dollars—about the same price as getting a radiocarbon date. Ancient marriage traditions—and politics—revealed in giant family trees built from DNA 2023-10-04T04:00:00Z The paper drew praise but also skepticism, particularly around its radiocarbon dating method. New footprint dates bolster claim that humans lived in Americas during Ice Age 2023-10-04T04:00:00Z Using state-of-the-art tree ring and radiocarbon dating methods, researchers found the most recent major earthquake on the Seattle Fault wasn’t a solo act. New earthquake study: 'The big one,' but make it double? 2023-09-27T04:00:00Z Different fuel types, explained Czimczik, have different radiocarbon signatures, such that when they analyzed the smoke they discovered radiocarbon values associated with large fuel sources like fallen tree logs. Scientists reveal what fuels wildfires in Sierra Nevada Mountains 2023-09-25T04:00:00Z “We’ve now got three different dating techniques—radiocarbon dating of the seeds, radiocarbon dating of the pollens and luminescence dating of the quartz—that all show people were there.” Ancient Footprints Affirm People Lived in the Americas More than 20,000 Years Ago 2023-10-05T04:00:00Z Based on shared stretches of DNA, studies can identify siblings and link grandparents to grandchildren, tracing the chronology of a cemetery in a way traditional radiocarbon dating, accurate to several decades at most, cannot. Ancient marriage traditions—and politics—revealed in giant family trees built from DNA 2023-10-04T04:00:00Z That could have skewed the initial radiocarbon dating and made the seeds—and the footprints—appear older than they actually were. New footprint dates bolster claim that humans lived in Americas during Ice Age 2023-10-04T04:00:00Z Tree rings can yield much more precise dates than radiocarbon, Black explained. New earthquake study: 'The big one,' but make it double? 2023-09-27T04:00:00Z He claimed the bodies had been found in Cusco, Peru, in 2017 and that radiocarbon testing dated the objects to be up to 1,800 years old. Nasa's UFO report: What we learned from UAP study 2023-09-14T04:00:00Z The swords were dated based on their typology, and have not yet undergone radiocarbon dating. 4 exceptionally preserved Roman swords discovered in a Dead Sea cave in Israel 2023-09-06T04:00:00Z “We often tell archaeologists to wait and do radiocarbon dating after we put together the pedigree,” says University of the Basque Country geneticist Iñigo Olalde. Ancient marriage traditions—and politics—revealed in giant family trees built from DNA 2023-10-04T04:00:00Z In different labs than those used in the first paper, researchers isolated and radiocarbon dated pollen from pine trees—terrestrial plants with no danger of absorbing old carbon. New footprint dates bolster claim that humans lived in Americas during Ice Age 2023-10-04T04:00:00Z The validity of the date was confirmed through radiocarbon analysis of individual tree rings, looking for evidence of cosmic timestamps called Miyake events. New earthquake study: 'The big one,' but make it double? 2023-09-27T04:00:00Z In 2018, he and colleagues started on an ambitious plan to radiocarbon date bones from a tar pit first excavated in the 1920s. Raging wildfires may have doomed California’s ancient megamammals, tar pit fossils reveal 2023-08-16T04:00:00Z The study began with an effort to use radiocarbon dating to determine the ages of a few hundred of the approximately 3.5 million bones unearthed over the years from the La Brea Tar Pits. Wildfires once fueled extinctions in Southern California. Will it happen again? 2023-08-17T04:00:00Z In addition to the radiocarbon dating, the authors of the new study also confirmed that they could successfully induce the nematodes to enter and exit the dormancylike state of cryptobiosis using special preparatory cues. 46,000-Year-Old Worm Possibly Revived from Siberian Permafrost 2023-07-27T04:00:00Z “The new dates harmonize perfectly with the previous chronology,” agrees Thomas Higham, a radiocarbon dating expert at the University of Vienna who wasn’t involved in the work. New footprint dates bolster claim that humans lived in Americas during Ice Age 2023-10-04T04:00:00Z Luckily for dendrochronology, spikes in cosmic radiation generate spikes in atmospheric levels of carbon-14, the isotope whose slow decay is the clock that anchors radiocarbon dating. New earthquake study: 'The big one,' but make it double? 2023-09-27T04:00:00Z New radiocarbon dates from the La Brea Tar Pits suggest these big animals began to disappear about 13,200 years ago, just when charcoal and pollen from a nearby lake suggest rampant wildfires. Raging wildfires may have doomed California’s ancient megamammals, tar pit fossils reveal 2023-08-16T04:00:00Z Unlike other methods of fossilization in which organic matter is replaced over time by sediment, tar preserves a bone’s collagen, which is more conducive to getting a precise radiocarbon date. Wildfires once fueled extinctions in Southern California. Will it happen again? 2023-08-17T04:00:00Z Other experts want to see the use of additional methods to establish chronology because radiocarbon dating is not always reliable. 1,800-Year-Old Spices Are Earliest Evidence of Curry Making in Southeast Asia 2023-07-21T04:00:00Z The mummy has not yet been subjected to radiocarbon dating to determine its age, Aguilar said. Archeologists find mummy surrounded by coca leaves on hilltop in Peru’s capital 2023-06-15T04:00:00Z Without objects to help establish the period, scientists are waiting for radiocarbon dating tests on the bones. Spanish scientists seek to crack mystery of Canaries skeleton cave 2023-05-09T04:00:00Z Based on radiocarbon dating and other clues, the scientists discovered that condors have nested on this cliffside for some 2200 years. News at a glance: U.S. tallies old-growth forests, Canadian scientists march for higher pay, and condor poop reveals the birds’ ancient history 2023-05-03T04:00:00Z Using radiocarbon dating, the scientists concluded that local condors had been using the nest for some 2200 years. 2200-year-old pile of excrement provides window into condors’ past 2023-05-02T04:00:00Z Researchers used high-resolution satellite mapping and radiocarbon analysis to measure the logjam and age the wood. World’s Largest Logjam Stores 3 Million Tons of Carbon 2023-04-24T04:00:00Z Its mostly predictable decay rate is the basis of standard radiocarbon dating. Marking time: Cosmic ray storms can pin precise dates on history from ancient Egypt to the Vikings 2023-04-13T04:00:00Z The hairs and their wooden canisters were analyzed with radiocarbon dating, indicating they were buried in the Late Bronze Age around 3000 years ago. Bronze Age Europeans were getting high on all kinds of drugs, hair analysis study finds 2023-04-12T04:00:00Z As she, Taylor, and other members of their team gathered radiocarbon dates from sites across the Great Plains, they found more samples that predated the Pueblo Revolt—some by nearly a century. Horse nations: Animal began transforming Native American life startlingly early 2023-03-29T04:00:00Z Since the 1950s researchers have known that the concentration of radiocarbon in tree rings varies over time. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z They radiocarbon dated some of the marine shells they found, giving a range of potential dates from the 14th to the 16th centuries. Ancient Tsunami Detectives Hunt for Long-Lost Cataclysms 2023-03-01T05:00:00Z There, Miyake and her Arizona colleagues, along with colleagues around the world, are aiming to patch together from recently deceased and long-dead trees a complete radiocarbon record stretching back 12,000 years. Marking time: Cosmic ray storms can pin precise dates on history from ancient Egypt to the Vikings 2023-04-13T04:00:00Z But it will take radiocarbon dating to know for sure. 10 Mummified Crocodiles Emerge From an Egyptian Tomb 2023-01-18T05:00:00Z But the new radiocarbon date for the Blacks Fork horse shows it was raised, tethered, and buried sometime between 1600 and 1650, many hundreds of kilometers north of Paa’ko and Spanish outposts in New Mexico. Horse nations: Animal began transforming Native American life startlingly early 2023-03-29T04:00:00Z But until recently, relatively large amounts of cellulose were required for radiocarbon analyses, so most measurements were based on five or even 10 years’ worth of tree rings. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z In 2019, he and colleagues published a paper in Science that included radiocarbon dates obtained from bits of bone and charcoal excavated in collaboration with the Nez Perce Tribe. Deadly sharp points found in Idaho could be first American-made tools 2022-12-22T05:00:00Z By sampling burned crusts of food stuck to the broken pots—remnants of bygone meals—they were able to get hundreds of new radiocarbon dates. Ancient hunter-gatherers were potters, too 2022-12-22T05:00:00Z Such uncertainty exists, in part, because the radiocarbon analysis that scientists use to date organic remains is less accurate for certain epochs. Archaeologists Devise a Better Clock for Biblical Times 2022-12-20T05:00:00Z More radiocarbon dates and DNA, along with other methods, might even document an intersection between ancient horses and the Lakota and other groups, he says. Horse nations: Animal began transforming Native American life startlingly early 2023-03-29T04:00:00Z She used a sensitive technique known as accelerator mass spectrometry to detect minute amounts of radiocarbon, which she hoped would shed light on when—and why—such an event might have happened. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z But these dates were ultimately approximations, based on a combination of younger radiocarbon dates and statistical extrapolation. Deadly sharp points found in Idaho could be first American-made tools 2022-12-22T05:00:00Z Destructive sampling would also be needed for radiocarbon dating. Meeting the ancestors: History of Ashkenazi Jews revealed from medieval DNA 2022-11-30T05:00:00Z “And in return, archaeology gets a new tool for dating, whose main application is in the first millennium B.C., a period when radiocarbon is less effective and impossible to rely on.” Archaeologists Devise a Better Clock for Biblical Times 2022-12-20T05:00:00Z As they persuade curators to part with bits of bone for radiocarbon and chemical testing, the team also digitizes the bones with a hand-held 3D scanner. Horse nations: Animal began transforming Native American life startlingly early 2023-03-29T04:00:00Z Plot a series of radiocarbon measurements as a function of time, and a Miyake event will look much like a cliff that’s nearly vertical on one face but much more gradually sloping on the other. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z To figure out the age of each layer, we typically use radiocarbon dating. Ancient traces of hurricanes’ impact on the Atlantic sea floor doesn't bode well for the coast 2022-11-30T05:00:00Z “The finds have definitely gotten older,” said Pilo, the researcher in Norway, who has been coming across artifacts that radiocarbon dating shows are thousands of years old. The world’s melting glaciers are yielding up their secrets too quickly 2022-11-01T04:00:00Z From around 800 to 400 B.C., as a result of changes in the percentage of radiocarbon in the atmosphere, the resolution of radiocarbon dating during those years is so limited that archaeologists seldom use it. Archaeologists Devise a Better Clock for Biblical Times 2022-12-20T05:00:00Z The researchers took a tiny skin sample for radiocarbon dating and used computed tomography to virtually autopsy the mummy. Rare Baby Mummy Identified as Austrian Noble 2022-10-28T04:00:00Z After a burst of radiocarbon is created in the atmosphere, it is eventually entombed in sediments at the bottom of the ocean. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z It’s “a good starting point,” but the conclusions could change based on more accurate dating, says Sahra Talamo, a chemist who directs a radiocarbon laboratory at the University of Bologna. Modern humans and Neanderthals may have overlapped, shared culture in Western Europe 2022-10-13T04:00:00Z As she worked, Hayeur Smith entered her data and extracted small samples for further analysis and testing, including a type of radiocarbon dating called accelerator mass spectrometry. Viking Textiles Show Women Had Tremendous Power 2022-09-15T04:00:00Z The Israel Antiquities Authority said it authenticated its age using radiocarbon dating, which corresponded with the age of the text’s writing style. Israel acquires papyrus with Hebrew inscription from Montana 2022-09-07T04:00:00Z The researchers radiocarbon dated bits of charcoal in sediment layers immediately above and below the grave to about 31,000 years ago. World’s oldest amputation: Foot removed 31,000 years ago—without modern antibiotics or painkillers 2022-09-07T04:00:00Z Gaining a better understanding of the timing and duration of Miyake events demanded a better accounting of radiocarbon moving though the global carbon cycle, Pope and his colleagues realized. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z Hoping to clarify the dates for sites containing Châtelperronian and proto-Aurignacian artifacts, Djakovic and colleagues reran the radiocarbon analyses performed by other teams representing 17 sites across France and northern Spain. Modern humans and Neanderthals may have overlapped, shared culture in Western Europe 2022-10-13T04:00:00Z How old is a skull that contains one-fifth as much radiocarbon as a modern skull? Calculus, Volume 1 2016-03-30T00:00:00Z An example is shown in Figure 8.16; radiocarbon dates from wood fragments in glacial sediments have been used to estimate the time of the last glacial advance along the Strait of Georgia. Physical Geology 2015-01-01T00:00:00Z They also applied another technique known as electron spin resonance dating to directly date one of the skeleton’s molars; the results matched the sediment’s radiocarbon dates. World’s oldest amputation: Foot removed 31,000 years ago—without modern antibiotics or painkillers 2022-09-07T04:00:00Z Based on this analysis, most Miyake events appeared to be consistent with short, nearly instantaneous “spikes” of radiocarbon production. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z Anything living at the time incorporated extra amounts of the isotope as a result, throwing off modern efforts to radiocarbon date their remains. Modern humans and Neanderthals may have overlapped, shared culture in Western Europe 2022-10-13T04:00:00Z The radiocarbon dating technique is thus useful for 57,300 years or so, about 10 half-lives back. An Introduction to Geology 2017-01-01T00:00:00Z The report in Antiquity was based on radiocarbon dating of 23 samples of chicken bones from North Africa and Europe, many of which had been previously studied. Before Chickens Were Nuggets, They Were Revered 2022-06-07T04:00:00Z She and her team will also make use of more traditional methods, like skeletal analysis, dental record searches and radiocarbon dating. Australia Wields a New DNA Tool to Crack Missing-Person Mysteries 2022-05-28T04:00:00Z High-energy particles can become trapped there, thousands of kilometers above the bulk of the atmosphere—high enough to take several years to dribble down and form radiocarbon. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z Only very recently have they adopted techniques such as radiocarbon dating, long considered standard practice by researchers working in other parts of the world. Jerusalem Archaeology Modernizes but Runs into Ancient Problems 2022-04-11T04:00:00Z Comparisons of carbon ages with tree-ring data and other data for known events have allowed reliable calibration of the radiocarbon dating method. An Introduction to Geology 2017-01-01T00:00:00Z Julia Best, an author on the report, said that with radiocarbon dating rather than geological and archaeological methods, “We now have the clearest picture yet of our early interactions with chickens.” Before Chickens Were Nuggets, They Were Revered 2022-06-07T04:00:00Z For the new study, they extracted the remains of long-dead microbes from the layers of mud on the lake bed, which they dated with radiocarbon. Greenland’s Vikings may have vanished because they ran out of water 2022-03-22T04:00:00Z That could cause a seemingly short-duration event such as a pulse of radiocarbon to appear smeared out over time when one looks at tree rings. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z Israeli archaeologists also have partnered with the country’s Weizmann Institute of Science in Rehovot to gather large numbers of radiocarbon samples to calibrate a more accurate chronology of Jerusalem’s past. Jerusalem Archaeology Modernizes but Runs into Ancient Problems 2022-04-11T04:00:00Z Burleigh, R. W. F. Libby and the development of radiocarbon dating. An Introduction to Geology 2017-01-01T00:00:00Z The archaeologists directly dated 50 individuals with radiocarbon, finding they lived between 1000 to 9600 years ago. The Maya—and the maize that sustained them—had surprising southern roots, ancient DNA suggests 2022-03-22T04:00:00Z And because they are often inscribed on inorganic material like stone or metal, it means methods like radiocarbon dating can’t be used to find out when they were written. DeepMind’s new AI model helps decipher, date, and locate ancient inscriptions 2022-03-09T05:00:00Z Some researchers have turned to ice core records to look for beryllium 10 and chlorine 36—two isotopes that, like radiocarbon, are produced in the atmosphere by high-energy phenomena. Mystery of Ancient Space Superstorms Deepens 2023-03-06T05:00:00Z The most recent remains, of an adult woman from Zambia’s Kalemba rock shelter, were radiocarbon dated to about 5000 years ago. Oldest human DNA from Africa reveals complex migrations 2022-02-23T05:00:00Z Using radiocarbon tracings, the archaeologists have dated the grave to the approximate time of the construction of Stonehenge, between 3005 and 2890 B.C. British archaeologists found a 5,000-year-old drum and three children locked in a neolithic embrace 2022-02-12T05:00:00Z Rachel Wood, a radiocarbon scientist at Australian National University, calls the study “remarkable.” Did Neanderthals and modern humans take turns living in a French cave? 2022-02-08T05:00:00Z A new study based on radiocarbon dating backs their claim, suggesting the vertebrae-on-posts, as they’re known, are some 500 years old. Reconstructed human spines may honor Peru’s defiled dead 2022-02-01T05:00:00Z A small fragment of the figure, which had broken off, has been sent for radiocarbon dating. Wooden Roman figure found at Twyford during HS2 dig 2022-01-13T05:00:00Z The most reliable age-determination methods are analyses of tree rings, with help from radiocarbon dating when necessary, they add. Trees Have the Potential to Live Indefinitely 2021-12-24T05:00:00Z She was able to pick out two samples and radiocarbon date them. Bronze Age ‘power helmets’ unearthed from Danish bog 2021-12-21T05:00:00Z Instead, in a new study, researchers turned to radiocarbon dating. Scientists determine the age of one of Africa’s most famous trees 2021-11-12T05:00:00Z Next, the researchers radiocarbon dated three bones and nine reeds. Reconstructed human spines may honor Peru’s defiled dead 2022-02-01T05:00:00Z He says more radiocarbon dating of the ceremonial structure will be needed to determine whether the platform itself really predates Aguada Fénix or was a later addition. Nearly 500 Mesoamerican monuments revealed by laser mapping—many for the first time 2021-10-25T04:00:00Z Pinning down the settlement’s age has been a challenge — radiocarbon measurements of artifacts from L’Anse aux Meadows span the entire Viking Age, from the late eighth through the 11th centuries. Vikings were in the Americas exactly 1,000 years ago 2021-10-21T04:00:00Z They said that using an atmospheric radiocarbon signal produced by a dated solar storm as a reference, they were able to pin the "exact felling year of the tree" to 1021. Vikings settled in North America in 1021AD, study says 2021-10-21T04:00:00Z The radiocarbon technique can be used to age date other trees with complicated growth histories, the team suggests. Scientists determine the age of one of Africa’s most famous trees 2021-11-12T05:00:00Z The new dating method relies on the fact that solar storms produce a distinctive radiocarbon signal in a tree’s annual growth rings. Goodbye, Columbus: Vikings crossed the Atlantic 1,000 years ago 2021-10-20T04:00:00Z “The precision is astounding,” says Rachel Wood, a radiocarbon scientist at the Australian National University who wasn’t involved in the new study. First Viking settlement in North America dated to exactly 1000 years ago 2021-10-20T04:00:00Z Only a fleeting fraction is radioactive carbon 14, also called radiocarbon. Vikings were in the Americas exactly 1,000 years ago 2021-10-21T04:00:00Z These seeds, when radiocarbon dated, would reveal the age of the footprints themselves. Fossil footprints prove humans populated the Americas thousands of years earlier than we thought 2021-10-01T04:00:00Z To find out, the researchers radiocarbon dated seeds embedded in several layers of earth between the footprints. Human footprints near ice age lake suggest surprisingly early arrival in the Americas 2021-09-22T04:00:00Z A team from the US Geological Survey carried out radiocarbon dating on seeds found in sediment layers above and below where the footprints were found. Earliest definitive evidence of people in Americas 2021-09-23T04:00:00Z “The idea to use these short-term sharp fluctuations in radiocarbon … has been around for a few years, but it is great to see it actually being used to date an important archaeological site.” First Viking settlement in North America dated to exactly 1000 years ago 2021-10-20T04:00:00Z But then in 2012, researchers found two cedar trees in Japan that recorded inexplicably high levels of radiocarbon in their rings dating A.D. Vikings were in the Americas exactly 1,000 years ago 2021-10-21T04:00:00Z “I think the evidence is very convincing and extremely exciting,” says University of Oxford radiocarbon expert Tom Higham, who was not involved in the new study. Footprint Discovery Hints at Humans in the Americas More Than 20,000 Years Ago 2021-09-23T04:00:00Z “From the dating perspective I think the authors have done a very sound job,” says Tom Higham, a leading radiocarbon dating expert at the University of Oxford. Human footprints near ice age lake suggest surprisingly early arrival in the Americas 2021-09-22T04:00:00Z This refers to the way that old carbon can sometimes get recycled in aqueous environments, interfering with radiocarbon results by making a site seem older than it is. Earliest definitive evidence of people in Americas 2021-09-23T04:00:00Z Scientists have previously dated bits of wood from the site using radiocarbon dating, which measures the decay of the radioactive isotope carbon-14 in organic material and often gives dates within a couple hundred years. First Viking settlement in North America dated to exactly 1000 years ago 2021-10-20T04:00:00Z The researchers found that their three pieces of wood all exhibited a pronounced increase in radiocarbon that began 28 rings before their outer bark. Vikings were in the Americas exactly 1,000 years ago 2021-10-21T04:00:00Z The radiocarbon dates for the seeds from the New Mexico tracks would thus be the clearest evidence yet that people were making ancient North America their home more than 20,000 years ago. Footprint Discovery Hints at Humans in the Americas More Than 20,000 Years Ago 2021-09-23T04:00:00Z Such rings “allow us to reconstruct patterns of radiocarbon through time,” says Charlotte Pearson of the Laboratory of Tree-Ring Research at the University of Arizona, who is a co-author on the paper. Solar ‘Superflares’ Rocked Earth Less Than 10,000 Years Ago—and Could Strike Again 2021-09-13T04:00:00Z The technique has been compared to radiocarbon dating but with light. Scientists unravel a mystery about a naked giant carved into an English hill 2021-05-16T04:00:00Z Working with three chunks of wood with recognizable edges, the researchers radiocarbon dated the rings in each piece, looking for a telltale spike in carbon-14. First Viking settlement in North America dated to exactly 1000 years ago 2021-10-20T04:00:00Z Researchers radiocarbon dated the samples, some of which were excavated almost 100 years ago and stored in a museum, to between 0 C.E. and 1000 C.E. Piles of ancient poop reveal “extinction event” in human gut bacteria 2021-05-12T04:00:00Z Phil de Jersey said they were waiting for results from radiocarbon dating analysis to get a precise age. Prehistoric human bones in Guernsey discovered by coastal walker 2021-04-07T04:00:00Z These early migrants made good time: By 14,800 years ago at the latest, radiocarbon dates suggest they were setting up camp in Monte Verde in southern Chile. Earliest South American migrants had Australian, Melanesian ancestry 2021-03-29T04:00:00Z The radiocarbon analysis in 1997 was greeted with derision by some scientists who found the conclusions implausibly old. How the World’s Oldest Wooden Sculpture Is Reshaping Prehistory 2021-03-22T04:00:00Z The researchers used modern methods to reanalyze 53 radiocarbon dates—including eight newly collected dates—associated with the Old Copper Culture. Ancient Native Americans were among the world’s first coppersmiths 2021-03-19T04:00:00Z Scientists across disciplines said the kauri data were a dazzling addition to the radiocarbon canon and were long awaited. A Hitchhiker’s Guide to an Ancient Geomagnetic Disruption 2021-02-18T05:00:00Z The team used radiocarbon to date the kauri wood by lining it up with accurate, but coarse, radiocarbon cave records from China. Ancient kauri trees capture last collapse of Earth’s magnetic field 2021-02-18T05:00:00Z But radiocarbon dating showed a puzzling gap of several centuries between activity at the bluestone quarries and the earliest construction at Stonehenge. England’s Stonehenge was erected in Wales first 2021-02-11T05:00:00Z More precise dating will be possible once it is delivered to a lab for radiocarbon studies. Well-preserved Ice Age woolly rhino found in Siberia 2020-12-30T05:00:00Z “We used radiocarbon methods to date those pieces,” Hurwitz said, “and they all came within like 100 years of each other.” Study: Climate change could interrupt Yellowstone geysers 2020-10-24T04:00:00Z He said the fossil kauri trees were the main way for scientists to get at radiocarbon information from so long ago. A Hitchhiker’s Guide to an Ancient Geomagnetic Disruption 2021-02-18T05:00:00Z Spikes in radiocarbon indicated the magnetic field weakened to some 6% of its present day strength by 41,500 years ago. Ancient kauri trees capture last collapse of Earth’s magnetic field 2021-02-18T05:00:00Z Susan Trumbore was recognized for her ‘’outstanding contributions’’ to the study of the carbon cycle and its effects on climate, as well as for pioneering the use of radiocarbon measurements. Scientists focusing on climate issues claim 3 Balzan prizes 2020-09-14T04:00:00Z Discovered in the late 1940s, radiocarbon dating transformed the study of prehistory and became the gold standard for establishing chronologies in archaeology. Long-Awaited Update Arrives for Radiocarbon Dating 2020-09-11T04:00:00Z The findings were made using radiocarbon dating and X-ray scanning techniques. Bronze Age mourners 'kept remains as relics' 2020-08-31T04:00:00Z Paleontologist and Las Vegas Natural History Museum lab chief Steve Rowland is using radiocarbon dating to determine the exact age of the fossils. Ice Age musk ox? Nevada man finds bones in backyard 2020-08-30T04:00:00Z Still, neither milestone in human evolution lines up well with the flip 42,000 years ago, and neither was sudden, says Thomas Higham, an archaeologist and radiocarbon expert at the University of Oxford. Ancient kauri trees capture last collapse of Earth’s magnetic field 2021-02-18T05:00:00Z Also called “radiocarbon,” this isotope is generated by cosmic rays colliding with nitrogen in Earth’s atmosphere, says José Capriles, an archaeologist at Pennsylvania State University. How Do Scientists Determine the Ages of Human Ancestors, Fossilized Dinosaurs and Other Organisms? 2020-08-04T04:00:00Z “The major difference is that the possible ranges are now substantially narrower,” says Sturt W. Manning, a Cornell University archaeologist, who led early Thera-related radiocarbon work and was involved in IntCal20. Long-Awaited Update Arrives for Radiocarbon Dating 2020-09-11T04:00:00Z When the researchers radiocarbon dated wooden logs and posts, they found that the newest were from 1670 C.E., more than 100 years after the Spanish incursion, they report this month in American Antiquity. Sacred site reveals how Georgia’s Muscogee tribes resisted colonial culture for 130 years 2020-07-22T04:00:00Z From the 1940s, radiocarbon dating gradually transformed archaeology. The devastating history of Hurricane Katrina, the next wave of universities, and a personal memoir of the HIV epidemic: Books in brief 2020-06-16T04:00:00Z But the invention of radiocarbon dating in the 1940s brought one such revolution, by providing a consistent, worldwide system for placing archaeological material in chronological order. Large-scale early Maya sites in Mexico revealed by lidar mapping technology 2020-06-02T04:00:00Z But “as living organisms die, they stop consuming or incorporating radiocarbon,” Capriles says, and “the process of radioactivity kicks in,” with the isotope decaying back into nitrogen. How Do Scientists Determine the Ages of Human Ancestors, Fossilized Dinosaurs and Other Organisms? 2020-08-04T04:00:00Z Manning says the next IntCal will incorporate more regional variations in radiocarbon measurements, possibly explaining discrepancies from the period around the Thera eruption. Long-Awaited Update Arrives for Radiocarbon Dating 2020-09-11T04:00:00Z Based on radiocarbon dates of charcoal and bones found alongside the tooth, researchers calculated it to be around 14,000 years old. Oldest cousin of Native Americans found in Russia 2020-05-20T04:00:00Z The basis of radiocarbon dating is simple: all living things absorb carbon from the atmosphere and food sources around them, including a certain amount of natural, radioactive carbon-14. Carbon dating, the archaeological workhorse, is getting a major reboot 2020-05-18T04:00:00Z Each chest once held at least two bodies, which radiocarbon dating confirmed were 2,700 years old. When Cadaver Dogs Pick Up a Scent, Archaeologists Find Where to Dig 2020-05-19T04:00:00Z To achieve the most precise dating, he and other archaeologists also consider factors that cause local variations in atmospheric radiocarbon. How Do Scientists Determine the Ages of Human Ancestors, Fossilized Dinosaurs and Other Organisms? 2020-08-04T04:00:00Z Thus, radiocarbon dates need to be calibrated against independent measurements, primarily from chunks of ancient wood. Long-Awaited Update Arrives for Radiocarbon Dating 2020-09-11T04:00:00Z Meanwhile, Max Planck radiocarbon dating specialist Helen Fewlass and her colleagues directly dated collagen from 95 bones. Oldest Homo sapiens in Europe—and a cave bear pendant—suggest cultural link to Neanderthals 2020-05-11T04:00:00Z He cautions, however, that there are more sources of error in such measurements than just radiocarbon calibration: “Contamination is the biggest influence for dating really old bones like these.” Carbon dating, the archaeological workhorse, is getting a major reboot 2020-05-18T04:00:00Z Archaeologists had found fragments of human bone and teeth in the chest, but these had been removed months earlier for analysis and radiocarbon dating. When Cadaver Dogs Pick Up a Scent, Archaeologists Find Where to Dig 2020-05-19T04:00:00Z In fact, researchers released a major update of the radiocarbon calibration curves this year. How Do Scientists Determine the Ages of Human Ancestors, Fossilized Dinosaurs and Other Organisms? 2020-08-04T04:00:00Z Using radiocarbon dating, they determined the DNA belonged to people who lived between 9000 to 500 years ago. Ancient DNA reveals staying power of early people of the Andes 2020-05-07T04:00:00Z The wood was too old for radiocarbon dating, but by analyzing tree rings, pollen grains and sand, she and a team of researchers discovered that it was two ice ages old. Creatures in This Underwater Forest Could Save Your Life One Day 2020-03-31T04:00:00Z As a result, conversion tables are needed that match up calendar dates with radiocarbon dates in different regions. Carbon dating, the archaeological workhorse, is getting a major reboot 2020-05-18T04:00:00Z According to radiocarbon dating of burned food scraps, including rabbit bones, maize, and yucca from the tropical Maya region, the feast took place between 300 and 350 C.E. ‘Astounding new finds’ suggest ancient empire may be hiding in plain sight 2020-02-27T05:00:00Z Moreover, the layer belongs to the tenth century bc, according to twenty-first-century radiocarbon dating. The archaeology of Armageddon 2020-02-25T05:00:00Z By using radiocarbon dating, studying rock layers and a range of historical records, researchers analyzed the onset, the rate and the end of the monument construction period. Easter Island discovery: Experts shed new light on the mystery of the civilization’s 'collapse' 2020-02-11T05:00:00Z The charcoal often used for the Wanjina eyes allows for radiocarbon dating and puts the age of these paintings at up to 5000 years. Mysterious Australian rock art may depict the chaos following rising seas 2020-02-05T05:00:00Z The dark, cold waters that now hide the region add to its allure because they preserve organic material for DNA analysis and radiocarbon dating better than on land. Relics washed up on beaches reveal lost world beneath the North Sea 2020-01-30T05:00:00Z According to radiocarbon dating of organic matter covering the remains of the murals, the destruction took place between 350 and 400 C.E. ‘Astounding new finds’ suggest ancient empire may be hiding in plain sight 2020-02-27T05:00:00Z Suess concluded that levels of radiocarbon had been considerably higher five or six thousand years ago, perhaps because of increased solar activity or shifts in the earth’s magnetic field. The Past and the Future of the Earth’s Oldest Trees 2020-01-13T05:00:00Z While using the 1945 radiocarbon spike from nuclear testing is tempting because it would be relatively easy to locate in the rock record, is that really when human influence on Earth’s surface and processes began? Should the age of humans have a geological name? 2019-11-11T05:00:00Z Because the plantation is much too recent for radiocarbon dating, the archaeologists will create a timeline by tracing the changing styles of artifacts, including ceramics and buttons. Caribbean excavation offers intimate look at the lives of enslaved Africans 2019-11-07T05:00:00Z Back at Woods Hole, the team used radiocarbon dating to date the ages of mangrove leaves they found scattered within the cores. In the Blue Holes of the Bahamas, Secrets of Hurricanes Past 2019-11-01T04:00:00Z The radiocarbon dates for the mural destruction tell a clearer story, however. ‘Astounding new finds’ suggest ancient empire may be hiding in plain sight 2020-02-27T05:00:00Z In addition, he is exploring the complex relationship between bristlecone rings and radiocarbon dating. The Past and the Future of the Earth’s Oldest Trees 2020-01-13T05:00:00Z The archaeologists also radiocarbon dated samples of timbers found just a few centimetres underwater. Loch's mysterious drop to '750-year low level' 2019-10-16T04:00:00Z The researchers recalibrated the radiocarbon dates, constraining them to within 200 years in some cases, and identifying four to five generations of ancestors and descendants who lived in that time window. Why are adult daughters missing from ancient German cemeteries? 2019-10-10T04:00:00Z The new analysis aims to radiocarbon date the man's burial. New tests on medieval man buried in his boots 2019-09-24T04:00:00Z Davis partnered with researchers from Oxford University who used radiocarbon dating, which Davis called “the gold standard,” to determine the approximate ages of the artifacts. Artifacts in Idaho may be earliest evidence of humans in North America, study says 2019-08-29T04:00:00Z When they die, the radiocarbon in their remains steadily decays. The Past and the Future of the Earth’s Oldest Trees 2020-01-13T05:00:00Z Researchers used radiocarbon dating and Bayesian analysis -- a kind of statistical analysis -- to put the artifacts' age at 15,280 to 16,560 years. First American settlers may have been in Idaho 16,500 years ago, study says 2019-08-29T04:00:00Z He questions whether the very oldest radiocarbon dates from the site are actually linked to human occupation and says that more work needs to be done to determine when humans lived there. Ancient stone tools hint at settlers’ epic trek to North America 2019-08-28T04:00:00Z His team dated that site to about 16,000 years ago by optical luminescence, a method with larger error bars than radiocarbon dating. First people in the Americas came by sea, ancient tools unearthed by Idaho river suggest 2019-08-29T04:00:00Z The petrous part of the temporal bone is used for radiocarbon dating.Credit: Use ancient remains more wisely 2019-08-27T04:00:00Z In 1949, the chemist Willard Libby announced a remarkable discovery: the age of any organic remnant can be determined by measuring the level of radiocarbon against what a living thing typically maintains. The Past and the Future of the Earth’s Oldest Trees 2020-01-13T05:00:00Z Additionally, radiocarbon dating found that the remains are from very different eras. 'Skeleton Lake' mystery deepens with strange DNA discovery 2019-08-22T04:00:00Z By studying more of the site and its underlying geology, he hoped to get a more reliable estimate of its age through advanced radiocarbon dating techniques. Ancient stone tools hint at settlers’ epic trek to North America 2019-08-28T04:00:00Z These have to be taken carefully into account when estimating ages, scientists now realise, though the underlying basis of radiocarbon dating remains sound. ‘Perhaps the most important isotope’: how carbon-14 revolutionised science 2019-08-10T04:00:00Z In fact, even as late as the 1990s, large sections of ancient human skeletons were destroyed for radiocarbon and other analyses that can now be accomplished using much smaller portions of bone. Use ancient remains more wisely 2019-08-27T04:00:00Z In a stroke, radiocarbon allowed for a comprehensive dating of relics from human civilization and biological history. The Past and the Future of the Earth’s Oldest Trees 2020-01-13T05:00:00Z Because its decay can be used to track the passage of time, radiocarbon has made myriad contributions across the Earth, environmental, biological and archaeological sciences. Radiocarbon revolution: the story of an isotope 2019-06-16T04:00:00Z Using radiocarbon dating, we identified dates for 16 charcoal pieces. Perspective | Archaeologists dig up new clues about Angkor Wat and its ancient civilization 2019-06-07T04:00:00Z More recently, radiocarbon dating has changed from simply measuring the radioactivity emitted by carbon-14 nuclei to directly counting numbers of atoms of the isotope in a sample. ‘Perhaps the most important isotope’: how carbon-14 revolutionised science 2019-08-10T04:00:00Z It was international in character, if overwhelmingly male and white, and included experts with specialisms in paleoecology, radiocarbon isotopes and the law of the sea. The Anthropocene epoch: have we entered a new phase of planetary history? 2019-05-30T04:00:00Z Libby, who won a Nobel Prize for his work, was aware that his model relied on an untested assumption—that the level of radiocarbon in the atmosphere remains constant. The Past and the Future of the Earth’s Oldest Trees 2020-01-13T05:00:00Z Take Libby, winner of the 1960 Nobel Prize in Chemistry for his work developing radiocarbon dating. Radiocarbon revolution: the story of an isotope 2019-06-16T04:00:00Z Richards says the fossil’s age will be determined using radiocarbon dating. Indiana sewer project unearths trove of mastodon bones 2019-04-18T04:00:00Z Indeed, radiocarbon dates suggest that Neolithic people arrived marginally earlier in the west, but this remains a topic for future work. DNA reveals origin of Stonehenge builders 2019-04-15T04:00:00Z His doctoral dissertation pioneered environmental applications of radiocarbon measurements. Wallace Smith Broecker (1931-2019) 2019-03-25T04:00:00Z Using radiocarbon dating, the site was dated to about 1450 A.D., which placed it at a time before the neighboring Inca empire invaded. Massacre of Children in Peru Might Have Been a Sacrifice to Stop Bad Weather 2019-03-06T05:00:00Z There’s about 100 years of fuzziness in the radiocarbon dating, though. Scientists discover the origin of Stonehenge stones – quarries 180 miles away 2019-02-20T05:00:00Z "The result presented here, based on analyses of 2,410 radiocarbon dates and highly precise chronologies for megalithic sites and related contexts, suggests maritime mobility and intercultural exchange," the study's abstract reads. Stonehenge mystery solved? Prehistoric sailors may have been responsible for legendary structure 2019-02-12T05:00:00Z What she did was sift through radiocarbon dating data from 2410 ancient sites across Europe to reconstruct a prehistoric archaeological timeline. Stonehenge, other ancient rock structures may trace their origins to monuments like this 2019-02-11T05:00:00Z The radiocarbon dates obtained from some of the pendants and bone tools put them at 43,000 to 49,000 years old. Cave That Housed Neandertals and Denisovans Challenges View of Cultural Evolution 2019-01-30T05:00:00Z Neanderthals and Denisovans existed there at too early a time for radiocarbon dating of the specimens, which is usually effective only for dates up to about 50,000 years ago. Dating of hominin discoveries at Denisova 2019-01-29T05:00:00Z In 2015, several samples of cut-marked animal bones and charcoal found near the pinkie bone yielded radiocarbon dates of at least 50,000 years, at the oldest limit of the method. Mysterious human relatives moved into ‘penthouse’ Siberian cave 100,000 years earlier than thought 2019-01-30T05:00:00Z The brutal ramifications of settlement archaeology, when combined with the dramatic introduction of radiocarbon dating, shook the entire discipline to its foundations. Is Ancient DNA Research Revealing New Truths — or Falling Into Old Traps? 2019-01-17T05:00:00Z In the coming months, the team will attempt to establish the age of the animal remains using radiocarbon dating; this would reveal if they are younger than about 40,000 years. EXCLUSIVE: Tiny animal carcasses found in buried Antarctic lake 2019-01-17T05:00:00Z It used advanced radiocarbon dating techniques to reach its conclusions. Vintage Scotch whiskies found to be fake 2018-12-19T05:00:00Z Their favoured version of this approach incorporated radiocarbon and optically stimulated luminescence ages, information about the excavated layers, and timing based on genetic data. Dating of hominin discoveries at Denisova 2019-01-29T05:00:00Z The researchers, led by study co-author Adrian Lister, looked at 25 bone samples and found 23 were able to be analyzed using radiocarbon dating because there was enough collagen left in them. 'Unicorn' from the Ice Age may have existed at the same time as humans, shocking discovery reveals 2018-12-03T05:00:00Z By the time radiocarbon dating had come of age, in the postcolonial ferment of the 1960s, archaeology was already primed to relinquish its emphasis on narratives of migration. Is Ancient DNA Research Revealing New Truths — or Falling Into Old Traps? 2019-01-17T05:00:00Z In the 1950s, radiocarbon dating on paintings in the Lascaux Cave in southern France showed that the images — of horses and other animals — were made 15,500 years ago. In Cave in Borneo Jungle, Scientists Find Oldest Figurative Painting in the World 2018-11-07T05:00:00Z The researchers used radiocarbon dating to show that the wreck dates back more than 2,400 years. Oldest intact shipwreck discovered at bottom of Black sea 2018-10-26T04:00:00Z Scientists radiocarbon dated these objects, and more timber from a site farther inland, to about 200 C.E. to 300 C.E. These undeciphered symbols date back to Roman times 2018-10-26T04:00:00Z Rachel Wood, a radiocarbon dating expert at the Australian National University in Canberra who was not involved in the study, says she agrees the site is at least 45,000 years old. Humans braved Australia’s hostile desert interior thousands of years earlier than thought 2018-09-26T04:00:00Z In 1949, the invention of radiocarbon dating, by the American physical chemist Willard F. Libby, turned the whole field upside down. Is Ancient DNA Research Revealing New Truths — or Falling Into Old Traps? 2019-01-17T05:00:00Z Contributing Correspondent Lizzie Wade joins host Sarah Crespi to talk about a new study that used tree rings to calibrate radiocarbon readings—and get closer to pinning down a date. Ancient volcanic eruptions, and peer pressure—from robots 2018-08-16T04:00:00Z But radiocarbon dates from Akrotiri and nearby sites, including an olive tree buried by the eruption, pointed to a date more than 100 years earlier, in the late 17th century B.C.E. When did a massive volcano blow this island to bits and rock the ancient world? 2018-08-15T04:00:00Z But, he said, “when you work with radiocarbon you are on solid grounds in your dating”. Israeli prison to join Armageddon's list of ancient ruins 2018-08-08T04:00:00Z “Fifty thousand years is the limit for radiocarbon dating, so we really are at the edge of the barrier, and that’s why it’s possible this site is even older.” Humans braved Australia’s hostile desert interior thousands of years earlier than thought 2018-09-26T04:00:00Z By giving cosmically certain dates rather than cross-referenced estimations, radiocarbon dating undermined virtually all of archaeology’s basic premises. Is Ancient DNA Research Revealing New Truths — or Falling Into Old Traps? 2019-01-17T05:00:00Z The findings also suggest that scientists may need to change their standard radiocarbon dating calibration curve. Ancient volcanic eruptions, and peer pressure—from robots 2018-08-16T04:00:00Z A team led by archaeologist and tree ring scientist Charlotte Pearson of The University of Arizona in Tucson measured the radiocarbon stored in individual rings from five trees. When did a massive volcano blow this island to bits and rock the ancient world? 2018-08-15T04:00:00Z Using radiocarbon dating as well as a method that dates sediment where the bones where found, the team dated the gray and right whale bones to years from around 230 B.C. to 525 A.D. Ancient Romans Hunted ‘Sea Monsters.’ Were They Whales? 2018-07-16T04:00:00Z Based on the radiocarbon dates of charred plants in nearby fireplaces, the food scraps are about 14,400 years old. These crumbs come from the world’s oldest bread. It might have resembled a pita. 2018-07-19T04:00:00Z Accurately determining the age of a piece of ivory is impossible without going to the expense of radiocarbon dating. 'Sick' EU ivory sales a 'cover for poaching' 2018-07-09T04:00:00Z Baobabs do not regularly produce tree rings, so the team turned to radiocarbon dating. Last March of the ‘Wooden Elephants’: Africa’s Ancient Baobabs Are Dying 2018-06-12T04:00:00Z But Pearson's team was able to measure the radiocarbon more precisely, in single, annual rings of three ancient bristlecone pines in California and two oak trees in Ireland. When did a massive volcano blow this island to bits and rock the ancient world? 2018-08-15T04:00:00Z The researchers used radiocarbon dating to analyse samples taken from different parts of each tree’s trunk. Giant African baobab trees die suddenly after thousands of years 2018-06-11T04:00:00Z It was clear from archaeological and radiocarbon dating, which put the remains at about 1000 years old, that they belonged to the early generations of settlers. Iceland’s founding fathers underwent a rapid, 1000-year genetic shift 2018-05-31T04:00:00Z Lesnek and her colleagues used the latest research to account for the effect of marine diets on radiocarbon. New map of Alaska’s ancient coast supports theory that America’s first people arrived by boat 2018-05-30T04:00:00Z However, radiocarbon dating samples of its exposed roots allowed the researchers to determine when the tree germinated. Oldest European Tree Found—And It's Having a Growth Spurt 2018-05-25T04:00:00Z The resulting calibration curve differs slightly but significantly from the IntCal curve, with a so-called radiocarbon plateau that allows a much broader range of eruption dates. When did a massive volcano blow this island to bits and rock the ancient world? 2018-08-15T04:00:00Z The first radiocarbon dating of the idol, in the 1990s, yielded a startlingly early date: 9800 years old. This 11,000-year-old statue unearthed in Siberia may reveal ancient views of taboos and demons 2018-04-25T04:00:00Z When radiocarbon dating was performed on samples, scientists determined they were made 13,000 years ago. 13,000-Year-Old Human Footprints Found—Oldest Yet From North America 2018-03-29T04:00:00Z Assistance from science over the decades has been transformative, but not without difficulty: it took years for some archaeologists to be won over by radiocarbon dating. On the use and abuse of ancient DNA 2018-03-27T04:00:00Z Ramsey, C. B. Dealing with outliers and offsets in radiocarbon dating. Humans thrived in South Africa through the Toba eruption about 74,000 years ago 2018-03-11T05:00:00Z For radiocarbon experts, the result is bittersweet, vindicating archaeologists without challenging the radiocarbon measurements themselves. When did a massive volcano blow this island to bits and rock the ancient world? 2018-08-15T04:00:00Z Making matters worse, radiocarbon dating becomes increasingly unreliable beyond about 40,000 years. Neanderthals, the World’s First Misunderstood Artists 2018-02-22T05:00:00Z The tooth belonged to a woman who lived about 1000 years ago, according to radiocarbon dating. Genes of ‘extinct’ Caribbean islanders found in living people 2018-02-19T05:00:00Z But there was one problem—radiocarbon dating of the site revealed that the remains were too old to be Viking invaders. This Mass Grave May Belong to 'Great Viking Army' 2018-02-02T05:00:00Z These isotopes act as a "time stamp" for any shark alive when nuclear bomb testing of the 1950s and 1960s littered our atmosphere with traces of radiocarbon. Many Sharks Live a Century—Longer Than Thought 2017-11-13T05:00:00Z Sturt Manning, an archaeologist at Cornell University who led the earlier radiocarbon work, worries the new findings will encourage traditionalists to disregard radiocarbon evidence altogether. When did a massive volcano blow this island to bits and rock the ancient world? 2018-08-15T04:00:00Z Instead of studying radiocarbon, they would use a different clock to tell time. Neanderthals, the World’s First Misunderstood Artists 2018-02-22T05:00:00Z These were dated from organic material within the slag heaps using radiocarbon dating. Mysterious "Geomagnetic Spike" 3,000 Years Ago Challenges Our Understanding of the Earth's Interior 2017-11-08T05:00:00Z The glacial mid-depth radiocarbon bulge and its implications for the overturning circulation. Abyssal ocean overturning shaped by seafloor distribution 2017-11-07T05:00:00Z The team also performed radiocarbon dating, a method used to accurately determine the age of artefacts. Ancient skull 'oldest tsunami victim' 2017-10-26T04:00:00Z "This paper will now be cited for the next decade to demonstrate that there's ambiguity with the radiocarbon, and therefore we should ignore it," he says. When did a massive volcano blow this island to bits and rock the ancient world? 2018-08-15T04:00:00Z But in 2002, radiocarbon dating of the North Sea jawbone suggested that the species was still prowling around Europe as early as 28,000 years ago—and the new DNA work backs up that estimate. This Saber-Toothed Cat Mingled With Modern Humans 2017-10-19T04:00:00Z State officials said radiocarbon dating showed there is a 50 percent chance that the canoe’s wood dates to the 1600s. Hurricane Irma cleanup turns up an ancient canoe 2017-10-13T04:00:00Z The authors incorporate an analysis of radiocarbon into their model that reveals a shadow layer between the surface and deep ocean, with stagnant properties and high potential for long-term carbon storage. Abyssal ocean overturning shaped by seafloor distribution 2017-11-07T05:00:00Z Scientists were able to gather much more precise estimates of the timing and duration of events in the period around 3200-2500 BC by examining more than 600 radiocarbon dates. Neolithic island rivalries revealed 2017-09-19T04:00:00Z "It's very bad luck that this really important eruption happens to occur on a radiocarbon plateau," Pearson says. When did a massive volcano blow this island to bits and rock the ancient world? 2018-08-15T04:00:00Z Earlier this year, a team led by archaeologists Thibaut Devièse and Thomas Higham at the University of Oxford in the United Kingdom turned to a more refined method of radiocarbon dating. Neandertals and early modern humans probably didn’t meet at rumored rendezvous site 2017-09-04T04:00:00Z Using radiocarbon dating, archaeologists recently determined that the wood used to create the vessel may date to the 1600s. Hurricane Irma cleanup turns up an ancient canoe 2017-10-13T04:00:00Z Backed by analysis of historical radiocarbon measurements, the findings imply that the geometry of the Pacific, Indian and Atlantic basins places a major external constraint on the overturning structure. Abyssal ocean overturning shaped by seafloor distribution 2017-11-07T05:00:00Z They used radiocarbon dating to gauge each sediment layer’s age, then analyzed the layers for their chemical content. Origins of Ancient Rome’s famed pipe plumbing system revealed in soil samples 2017-08-28T04:00:00Z Drawing from radiocarbon dates of proboscideans across the central part of North America, Widga and colleagues outlined what was happening to American mastodons towards the end of the Ice Age. Trundling toward Extinction 2017-08-20T04:00:00Z A piece of wood embedded in a footprint's fill provided the radiocarbon date. Most archaeologists think the first Americans arrived by boat. Now, they’re beginning to prove it 2017-08-10T04:00:00Z Because radiocarbon dating is limited to samples younger than 50,000 years ago, we relied on OSL to help us find the ages of the lower part of the site. Buried Tools and Pigments Tell a New History of Humans in Australia for 65,000 Years 2017-07-19T04:00:00Z Previous methods of dating artifacts relied on a technique called radiocarbon dating. Human Arrival In Australia Pushed Back 18,000 Years 2017-07-20T04:00:00Z They first performed radiocarbon dating on sediment starting at the surface until they got to layers that were about 37,000 years old. Humans First Arrived in Australia 65,000 Years Ago, Study Suggests 2017-07-19T04:00:00Z The database currently holds 70,000 radiocarbon records from 70 countries. World's largest hoard of carbon dates goes global 2017-07-10T04:00:00Z To find out, Des Lauriers will have to wait until the team excavates and takes samples for radiocarbon dating. Most archaeologists think the first Americans arrived by boat. Now, they’re beginning to prove it 2017-08-10T04:00:00Z The ultra-high resolution method revealed changes in lead levels down to a month-by-month basis, while radiocarbon techniques and other methods were used to confirm dates. ‘We have been poisoning ourselves’: has ice analysis revealed the truth about lead? 2017-05-30T04:00:00Z The bones were too old to be dated using the traditional radiocarbon technique, and too poorly preserved for researchers to extract any ancient DNA. Humanity’s strange new cousin is shockingly young — and shaking up our family tree 2017-05-09T04:00:00Z Over the years, compounds that contain carbon build up on top of the pictures and interfere with radiocarbon dating. Dreams of the Stone Age dated for first time in southern Africa 2017-05-02T04:00:00Z Any soft tissue in the fossilized bones had long decayed, so scientists couldn’t use radiocarbon dating to determine their age. Archaeology shocker: Study claims humans reached the Americas 130,000 years ago 2017-04-26T04:00:00Z And a cluster of stone tools next to a hearth on Triquet Island is 14,000 years old—the region's oldest artifact so far, according to radiocarbon dates from the hearth's charcoal. Most archaeologists think the first Americans arrived by boat. Now, they’re beginning to prove it 2017-08-10T04:00:00Z They couldn’t use radiocarbon dating on the mastodon remains because the bones lacked carbon-containing collagen protein. Controversial study claims humans reached Americas 100,000 years earlier than thought 2017-04-25T04:00:00Z The bones’ collagen, a protein that can be used for radiocarbon dating, was long gone. Were humans in the Americas 100,000 years earlier than scientists thought? 2017-04-26T04:00:00Z A radiocarbon analysis demonstrated that macaws were living there in the late 1000s and early 1100s, even as the pueblo was heading towards collapse. Prehistoric Native Americans farmed macaws in 'feather factories' 2017-04-09T04:00:00Z Rock-solid radiocarbon dates around the Pacific will be required to prove that stemmed points represent a coherent coastal culture, archaeologists say. Spear tips point to path of first Americans 2017-04-05T04:00:00Z Curiosity piqued, he returned for a test excavation and sent some shell and charcoal for radiocarbon dating. Most archaeologists think the first Americans arrived by boat. Now, they’re beginning to prove it 2017-08-10T04:00:00Z First, the team determined the order in which the bodies were buried using radiocarbon dating, says Kennett. Did women control the bloodline in ancient Chaco Canyon? 2017-02-21T05:00:00Z Isotope, radiocarbon and DNA analysis was performed in an effort to reveal details such as how a person's diet had changed during their lifetime and where they were likely to have lived. The archaeological legacy of the Crossrail excavations - BBC News 2017-02-09T05:00:00Z But when radiocarbon dating in the 1990s determined that they were much older, the finds drew attention from both scientists and the Fallon Paiute-Shoshone Tribe. North America’s oldest mummy returned to US tribe after genome sequencing 2016-12-06T05:00:00Z But by 1400, the settlement on the island's western coast had been abandoned, according to radiocarbon dates, and by 1450 the inhabitants in the Eastern Settlement on the island's southern tip were gone as well. Why did Greenland’s Vikings disappear? 2016-11-10T05:00:00Z The researchers determined the age of the organic material from the site through radiocarbon dating, a technique that measures the radioactive decay of carbon by comparing isotope ratios. Man looking for a place to pee stumbles upon one of Australia’s oldest prehistoric sites 2016-11-08T05:00:00Z "At a lot of sites, there's not been the preservation of materials that are needed to use widely applicable techniques such as radiocarbon dating. Bone is usually quite degraded in arid environments. " Rock shelter used by speedy early Australians - BBC News 2016-11-02T04:00:00Z Direct radiocarbon dating of the sample shows that it’s about 42,000 years old—just when the Châtelperronian beads and tools were made. Neandertals made their own jewelry, new method confirms 2016-09-16T04:00:00Z By radiocarbon dating pieces of charcoal found in the same layer as the fishhooks, the researchers determined the hooks were between 22,380 and 22,770 years old. World’s oldest fishhook found on Okinawa 2016-09-16T04:00:00Z Named after the site the remains were found, scientists analyzed bone protein and radiocarbon dating to determine the age. 'Well-preserved' rare mammoth skull unearthed in Channel Islands puzzles scientists 2016-09-16T04:00:00Z "That spike in radiocarbon isotopes in the atmosphere got incorporated into virtually all the food webs on the planet, and so into all of the tissues of living things," Bushnell said. Greenland sharks live to be ridiculously old — and may not have sex until they’re 150 2016-08-11T04:00:00Z "Also, the radiocarbon method is not very precise, and so is only really relevant for very long-lived species." 400-year-old Greenland shark ‘longest-living vertebrate’ - BBC News 2016-08-11T04:00:00Z Mr. Nielsen and his colleagues used radiocarbon dating and statistical methods to measure the sharks’ ages. Meet the Greenland Shark. It Could Be the Longest-Living Vertebrate. 2016-08-11T04:00:00Z So the 11-person team of researchers turned to math models and radiocarbon dating, a technique typically used to date fossils. Mysterious Greenland Shark May Live Hundreds of Years, Scientists Say 2016-08-11T04:00:00Z By correlating radiocarbon dates with shark lengths to calculate the age, the research team discovered one particularly aged shark was 392 years old, give or take 120 years. 400-year-old shark is the longest-living vertebrate ever 2016-08-11T04:00:00Z Using two different radiocarbon dating approaches, Julius Nielsen and colleagues discovered that the giant Greenland shark may live as long as 400 years. Podcast: 400-year-old sharks, busting a famous scientific hoax, and clinical trials in pets 2016-08-11T04:00:00Z Researchers used radiocarbon dating to determine the ages of 28 of the animals, and estimated that one female was about 400 years old. 400-year-old Greenland shark ‘longest-living vertebrate’ - BBC News 2016-08-11T04:00:00Z He found none, so he consulted Jan Heinemeier, an expert in radiocarbon dating at Aarhus University in Denmark. Greenland shark may live 400 years, smashing longevity record 2016-08-11T04:00:00Z Such measurements reflect levels of radiocarbon in the ocean when the lens was first formed. Near-blind shark is world’s longest-lived vertebrate 2016-08-10T04:00:00Z Unfortunately, the researchers were unable to extract DNA from the bones, and radiocarbon dating failed. Study reveals culprit behind Piltdown Man, one of science’s most famous hoaxes 2016-08-09T04:00:00Z Using radiocarbon dating of juvenile bones and soil samples along the Yellow River, Wu's team established that an earthquake triggered a huge landslide, damming the waterway in 1920 B.C. Chinese team says it found evidence of mythical great flood 2016-08-05T04:00:00Z Using radiocarbon dating of juvenile bones and soil samples along the Yellow River, Wu’s team established that an earthquake triggered a huge landslide, damming the waterway in 1920 B.C. Chinese team says it found evidence of mythical great flood 2016-08-05T04:00:00Z In this case, researchers correlated radiocarbon dates with shark length to calculate the age of their sharks. Greenland shark may live 400 years, smashing longevity record 2016-08-11T04:00:00Z It is difficult to determine when ancient floods happened, but radiocarbon dating of the Lajia human remains pegged the catastrophes to about 1900 B.C.E. Massive flood may have led to China's earliest empire 2016-08-04T04:00:00Z That puts a practical limit on such radiocarbon dating. Shell shock 2016-07-14T04:00:00Z By using radiocarbon dating and analyzing the pottery found in the graves, the researchers dated the cemetery to between the 10th century B.C. and ninth century B.C. Story of Philistines Could Be Reshaped by Ancient Cemetery 2016-07-10T04:00:00Z The expedition team is now performing DNA, radiocarbon and other tests on the remains in an attempt to pinpoint their provenance. Researchers make 'first discovery' of Philistine cemetery - BBC News 2016-07-10T04:00:00Z Now the team is performing DNA, radiocarbon and other tests on bone samples found at the cemetery, dating to the 11th to 8th centuries B.C. Israel find may help solve mystery of biblical Philistines 2016-07-10T04:00:00Z She knew that the dates uncovered by Rouzaud were somewhat suspect — radiocarbon dating is imprecise at the best of times and stops being reliable entirely at about 50,000 years. 170,000 years before Stonehenge, Neanderthals built their own incredible structure 2016-05-26T04:00:00Z Her team collected more than 2400 samples of botanical remains at 20 sites on the African mainland and on offshore islands and Madagascar, and obtained 43 radiocarbon dates from crop seeds. Ancient crop remains record epic migration to Madagascar 2016-05-30T04:00:00Z More than 70 samples of ancient organic material taken from the site and radiocarbon dated at Stafford's lab showed that each layer was slightly older than the one before it. Ancient tools and bone found in Florida could help rewrite the story of the first Americans 2016-05-13T04:00:00Z “I see no reason to accept their radiocarbon dates as accurate,” he says. Underwater archaeologists unearth ancient butchering site 2016-05-12T04:00:00Z When they radiocarbon dated the samples, they found that the biface was in a layer dated to 14,550 years ago. Ancient stone tools are ‘best’ evidence yet for early peopling of the Americas 2016-05-13T04:00:00Z The scientists used aerial and satellite images dating back to 1947 of 33 islands as well as traditional knowledge and radiocarbon dating of trees for their findings. Five Pacific islands lost to rising seas as climate change hits 2016-05-09T04:00:00Z Its fragile bones were too precious for radiocarbon dating, so the team collected nearby charcoal, on the assumption that it had accrued at the same time as the bones. Did humans drive 'hobbit' species to extinction? 2016-03-29T04:00:00Z The researchers then used coral samples to build a computer model of background levels of radiocarbon in the Hawaiian archipelago from 1900 to 2012. Old Nuclear Fallout Proves Useful for Sea Turtle Clues 2016-01-25T05:00:00Z Thanks to radiocarbon dating — a technique that uses the properties of carbon to assign a date to organic materials inside bone — scientists were able to narrow down the timing of the attack. This frozen mammoth’s injuries place humans in the Arctic 45,000 years ago 2016-01-14T05:00:00Z He says the high quality of the hand writing and the parchment show this was a prestigious work created for someone important - and the radiocarbon dating shows it is from the earliest days of Islam. Birmingham's ancient Koran history revealed - BBC News 2015-12-22T05:00:00Z Not only do they own the land where the bones were found, they have also agreed to pay for radiocarbon dating. Was the Virginia mastodon really there, or was this a big mistake? 2015-12-21T05:00:00Z Some of the artifacts have been radiocarbon dated to about 2,300 years ago. This Canada Island Is Losing Ground But Not Losing Hope 2015-12-16T05:00:00Z Bomb radiocarbon began tapering off only in the 1970s, with the end of widespread nuclear testing. Old Nuclear Fallout Proves Useful for Sea Turtle Clues 2016-01-25T05:00:00Z The scientists plan to determine the ages of the geological layers using radiocarbon dating, which will help them better understand how this happened, says Felix Pirson, director of the German Archaeological Institute in Istanbul. Lost Island of Ancient Greece Discovered in Aegean Sea 2015-11-20T05:00:00Z What was really startling about the Birmingham discovery was its early date, with radiocarbon testing putting it between 568 and 645. Birmingham's ancient Koran history revealed - BBC News 2015-12-22T05:00:00Z His team radiocarbon dated the plants and animal bone to between 14,500 and 18,500 years ago, and perhaps as early as 19,000 years ago. Oldest stone tools in the Americas claimed in Chile 2015-11-18T05:00:00Z For starters, the researchers don’t actually know how old the Denisovan fragments are, except that they’re more than 50,000 years old, the oldest dates that radiocarbon dating can reliably provide. DNA Reveals Mysterious Human Cousin With Huge Teeth 2015-11-16T05:00:00Z To discover what that “something” might be, he and his colleagues took a closer look at the radiocarbon levels in corals and turtles. Old Nuclear Fallout Proves Useful for Sea Turtle Clues 2016-01-25T05:00:00Z Suitable plant material, if found in the tomb, could yield a radiocarbon date for the burial. Grave of ‘Griffin Warrior’ at Pylos Could Be a Gateway to Civilizations 2015-10-26T04:00:00Z Murphy said he and Hoganson were excited about the possibility that the centuries-old site had been found and took three samples, each from a different log in the pit, for radiocarbon dating. Washburn man believes have might have found Fort Mandan 2015-10-18T04:00:00Z We are using radiocarbon dating, and also trying different isotope methods. Fishing for fossils in the North Sea 2015-09-22T04:00:00Z His age, established by radiocarbon dating as approximately 5,300 years, makes him by far the most ancient human being ever found virtually intact.” 6 Discoveries That Helped Explain Human Origins 2015-09-10T04:00:00Z In one final step, the researchers applied the radiocarbon results, along with known measurements from captive and wild-caught turtles, to a mathematical model that uses empirical data to estimate an animal’s growth rate. Old Nuclear Fallout Proves Useful for Sea Turtle Clues 2016-01-25T05:00:00Z Radiocarbon dating, for instance, might at least determine whether they’re older than 50,000 years, where the effectiveness of radiocarbon dating ends. New Human Ancestor Elicits Awe—and Many Questions 2015-09-10T04:00:00Z However, recent radiocarbon dating by scientists from Bradford and Durham Universities showed the skeleton was actually from between 3340 and 3090 BC - in the Neolithic period. Oldest UK case of rickets in Neolithic Tiree skeleton - BBC News 2015-09-10T04:00:00Z Determining the age of the bones or cave would help answer that, but caves are notoriously difficult to date, and the bones may be too old for radiocarbon dating. New human species discovered 2015-09-10T04:00:00Z Through radiocarbon dating, the group determined that the human artifacts and human remains recovered inside date back 5,000 to 7,500 years to what is known as the Middle Archaic Period. Native American site discovered, secured at Black Cat Cave 2015-08-06T04:00:00Z A lab at the University of Oxford used radiocarbon analysis to date the parchment, and discovered that the pages dated to nearly 1,400 years ago. Pages of Ancient Koran Among Oldest Yet Discovered 2015-07-22T04:00:00Z However, radiocarbon dating subsequently put the age of the skeleton in the Early Holocene1. The ancestry and affiliations of Kennewick Man : Nature : Nature Publishing Group 2015-06-17T04:00:00Z The university sent a small piece of the manuscript, written on sheep or goat skin, to Oxford University for radiocarbon dating. Quran Fragments, Said to Date From Time of Muhammad, Are Found in Britain 2015-07-22T04:00:00Z Because radiocarbon dating creates a range of possible ages, there is a handful of other manuscripts in public and private collections which overlap. 'Oldest' Koran fragments found in Birmingham University - BBC News 2015-07-21T04:00:00Z Growing emissions from the burning of fossil fuels are threatening the effectiveness of radiocarbon dating, according to new research. Emissions from fossil fuels may limit carbon dating - BBC News 2015-07-21T04:00:00Z According Raymond Rogers, all kinds of pseudoscientific theories have been put forward that invoke some mysterious radiation, which not only made the image itself but distorted the radiocarbon dating. How did the Turin Shroud get its image? - BBC News 2015-06-18T04:00:00Z When radiocarbon dating revealed that he was thousands of years old, a legal tug of war began between local tribes and scientists who wanted to study him, but ended in the tribes’ defeat in 2004. Mystery solved: 8500-year-old Kennewick Man is a Native American after all 2015-06-18T04:00:00Z As well as radiocarbon dating, the researchers used a variety of other techniques to peg the earliest shells as 45,000 years old. Ancient humans brought tools to Europe 2015-05-31T04:00:00Z The team dated the buttery bands using radiocarbon techniques, and confirmed and refined many of these dates by examining cores from another lake about 200 kilometres down the river. Floods might have doomed prehistoric American city 2015-05-03T04:00:00Z And new radiocarbon dates on animal bones and charcoal from the site suggest this modern child lived there approximately 40,710 to 35,640 years ago. Sophisticated tools may have spelled doom for Neandertals 2015-04-23T04:00:00Z Scientific sleuthing - including radiocarbon dating, bone analysis and DNA tests - confirmed the remains belonged to the long-lost king. From parking lot to cathedral, Richard III is comeback king 2015-03-26T04:00:00Z Scientific sleuthing — including radiocarbon dating, bone analysis and DNA tests — confirmed the remains belonged to the long-lost king. From parking lot to cathedral, Richard III is comeback king 2015-03-26T04:00:00Z Few of the specimens were dated, but the team used radiocarbon methods to date a few to about 12,000 years ago. Puzzle of Darwin’s 'strangest animals' finally solved 2015-03-18T04:00:00Z By radiocarbon dating the remains of that fire, archaeologists come up with the date of 1325, plus or minus 55 years. Crow Creek massacre in 1300s remains South Dakota’s worst 2015-02-09T05:00:00Z Speakman, using radiocarbon dating, reported that the skull was about seven centuries old. How did this ancient skull from the Southwest reach Gettysburg? 2015-02-05T05:00:00Z From 53 sites at various elevations and time periods, they managed to collect 63 samples of charred grains suitable for radiocarbon dating. Barley helped ancient Tibetans climb to 3400 meters 2014-11-20T05:00:00Z Investigators will next begin dating the artifacts with radiocarbon, and another investigation is being launched by one of Reitze’s colleagues to conduct ethno-botanical research on pre-ceramic sites, according to ABC News. Archaeologists Discover Two Ancient Villages in Arizona National Park In the Nature paper, Dr. Higham and his colleagues took advantage of advances in radiocarbon dating in testing samples of bone, charcoal and shell from 40 sites, mostly in Western Europe. Neanderthals in Europe Died Out Thousands of Years Sooner Than Some Thought, Study Says 2014-08-20T04:00:00Z Neanderthals and humans lived together in Europe for thousands of years, concludes a timeline based on radiocarbon dates from 40 key sites across Europe. Neanderthals: Bone technique redrafts prehistory 2014-08-19T04:00:00Z New dating techniques through radiocarbon testing also are available. Punishing Ivory Owners Rather Than Saving Elephants: When Ideologues Take Over the Regulatory State 2014-06-09T04:00:00Z The researchers also used radiocarbon dating to approximate the skeleton’s age. Prehistoric Skeleton in Mexico Is Said to Link Modern Native Americans to Siberians 2014-05-15T04:00:00Z Errors in radiocarbon dating mean that not all of the sites will date precisely to 12,800 years ago, Firestone argues. Prehistoric impact idea smacked down 2014-05-11T04:00:00Z The style of these artifacts—and a few radiocarbon dates—place the camp somewhere in the first 2 centuries C.E., too broad a range to be linked to a known specific event in Roman history. Ancient Roman Military Camp Unearthed in Eastern Germany 2014-05-13T04:00:00Z First, they use a chemical pretreatment to remove the contaminating carbon from the collagen in bones, then they measure the minuscule amounts of radiocarbon using a particle accelerator. Neanderthals: Bone technique redrafts prehistory 2014-08-19T04:00:00Z The woman probably lived around 1,700 years ago, at a time when Egypt was under Roman rule and Christianity was spreading, according to radiocarbon dating. Ancient Egyptian Mummy Found with Brain but No Heart 2014-04-08T21:20:00Z The bones have been removed from the site and will undergo radiocarbon dating to determine their age. Iron Age woman's footless body found 2014-03-18T19:35:44Z And much of his team's argument relies on cross-correlating various sites containing impact markers, some with good radiocarbon dates and some without. Prehistoric impact idea smacked down 2014-05-11T04:00:00Z Based on radiocarbon tests, as they report in the journal Current Biology, the revived moss turned out to be more than 1,500 years old. Matter: A Growth Spurt at 1,500 Years Old 2014-03-17T22:16:46Z Exactly what happened 30,000–50,000 years ago still vexes archaeologists because the period is right at the limit of accurate radiocarbon dating. Neanderthals: Bone technique redrafts prehistory 2014-08-19T04:00:00Z The burial was radiocarbon dated to AD 970-1025, which places it in the reign of Aethelred the Unready or Cnut the Great. Viking skeletons go on display 2014-03-06T05:38:01Z They started their search for viruses in the youngest piece, estimated at between 30,000 and 37,000 years old, based on radiocarbon dating. Matter: Out of Siberian Ice, a Virus Revived 2014-03-03T21:19:37Z The research team used radiocarbon dating and other techniques to precisely pin down the layers in which camel bones are found at a number of sites. Patriarchs Beat Their Camels (In Time) 2014-02-12T04:58:00Z The radiocarbon dates also suggest that northeastern megafauna underwent two major declines before finally going extinct. What killed the great beasts of North America? A new study points to environmental causes. 2014-02-10T18:02:02Z Next, they used radiocarbon dating to determine the age of the tooth. 'Neanderthal' Remains Actually Medieval Human 2013-12-30T23:45:00.402Z Dating the old deposits is obtained by radiocarbon analysis of organic debris caught up in the bands, such as molluscs and pieces of charcoal from old human-lit fires. Cave holds stunning tsunami clues 2013-12-12T02:06:49Z To date the buildings, fragments of charcoal and grains of sand were tested using a combination of radiocarbon and optically stimulated luminescence techniques. Earliest Buddhist 'shrine' uncovered 2013-11-26T00:58:47Z David Pompeani, a paleoclimateologist and doctorate candidate at the University of Pittsburgh, added that the study's strength was the number of samples and the extensiveness of the radiocarbon dating. Arctic Warming Unprecedented in Last 44,000 Years 2013-10-24T15:45:00.540Z "This is different to the traditional dating technique which takes advantage of the loss of radiocarbon through time." Nuclear carbon to fight poaching 2013-07-01T20:00:01Z All long records like the Malawi cores are very difficult to date, particularly when you get beyond the limits of radiocarbon dating which is 50,000 years. Volcano catastrophe idea 'dismissed' 2013-04-30T13:53:32Z As the human population grows, the number of archaeological sites and artifacts available for radiocarbon dating grows, too. Who Were the First Australians, and How Many Were There? 2013-04-24T00:15:00Z But radiocarbon dating put the specimen firmly in the 1200s, making it the oldest European anatomical preparation known. Grotesque Mummy Head Reveals Advanced Medieval Science 2013-03-05T18:45:01.233Z The skeleton was male and about the right age, and radiocarbon dating suggests that he died around the end of the fifteenth century. Body of evidence 2013-02-06T18:20:08.083Z A great advantage of such a stratigraphic succession is the possibility to date the organic remains with the radiocarbon dating method and produce exact prehistoric chronologies of these changes. Tsunami in the Geological Record 2012-12-26T23:45:00.200Z Working with evolutionary geneticist Mark Thomas at UCL, Shennan developed a statistical method to trace the rise and fall of population numbers by using calibrated radiocarbon dates at archaeological sites in Europe. Europe's First Farmers Came, Then Went 2012-11-16T22:26:51Z With radiocarbon analysis, the researchers determined that both the tooth and the beeswax were 6,500 years old. Observatory: A Beeswax Dental Filling That Lasted 6,500 Years 2012-09-24T18:23:36Z Archaeological sites containing pottery, and in some cases also iron, with radiocarbon dates clustering in the second half of the third millennium B.P., attest to a major immigration into the central African rainforest. [Technical Comment] Comment on “Intensifying Weathering and Land Use in Iron Age Central Africa” 2012-08-30T18:25:23.683Z Unlike archaeological radiocarbon dating based on the fixed rate of decay of the carbon-14 isotope, there is simply no fixed rate of decay of basic vocabulary, which would allow us to date ancestral proto-languages. English 'originated in Turkey' 2012-08-24T23:57:33Z To do this, the scientists employed state-of-the art radiocarbon dating techniques on human coprolites - desiccated excrement - found in the same layers of the cave's sediments. Early Americans' two tool tech 2012-07-13T08:30:07Z The researchers said they conducted DNA analysis on 65 coprolites and obtained 190 radiocarbon dates from material at several of the caves. Clovis People Weren’t Alone in North America, Spearheads and DNA Suggest 2012-07-12T18:12:25Z They inspected cross-sections of the reefs using radiocarbon dating and mass spectrometry techniques to find the “hiatus” in the reef’s growth, as it was described in the report. Scientists Find That Climate Change Stalls Reef Growth 2012-07-06T23:05:14Z Researchers took core samples from reefs off the coast of Panama, estimating their age at different levels using radiocarbon dating and other methods. Observatory: Coral Rebounded From Hostile Climate Millenniums Ago, Study Suggests 2012-07-05T18:25:12Z This is an improvement over radiocarbon dating, which becomes less reliable at ages over 30,000 years and is not usable in dating art unless the pigment contained carbon. With Science, New Portrait of the Cave Artist 2012-06-15T17:04:39Z Valladas says she and her colleagues encountered just such problems when they attempted to compare and crosscheck U-series and radiocarbon dating results from prehistoric cave paintings in Borneo back in 2003. Did Neandertals Paint Early Cave Art? 2012-06-14T20:30:00Z This is an improvement over radiocarbon dating, which becomes less reliable at ages over 30,000 years and is not usable in dating art unless the pigment contained carbon, not mostly minerals. New Dating Puts Cave Art in the Age of Neanderthals 2012-06-14T18:08:51Z Scientists led by Thomas Higham of the University of Oxford in England reported last week that improved radiocarbon tests determined that animal bones found with the flutes were 42,000 to 43,000 years old. Oldest Musical Instruments Are Even Older Than First Thought 2012-05-29T20:58:04Z Using radiocarbon dating, the researchers dated an ash layer to between 9300 and 10,500 years ago. Oldest New World Cave Art Discovered 2012-02-27T22:45:05.343Z The Russian team says it obtained a radiocarbon date of 31,800 years from seeds attached to the same placenta from which the living plants were propagated. New Life, From an Arctic Flower That Died 32,000 Years Ago 2012-02-22T07:20:03Z Despite this unpromising background, the new claim is supported by a firm radiocarbon date. New Life, From an Arctic Flower That Died 32,000 Years Ago 2012-02-20T20:05:20Z In addition to CT scanning of bones and teeth and radiocarbon dating of previously excavated materials, researchers hope to launch new archaeological digs, possibly in Europe or the Near East. New German-Israeli Center Will Research Archaeology and Anthropology 2012-01-06T19:13:44Z By radiocarbon dating lava flows and debris from explosive eruptions deposited over the past 2500 years, scientists pinpointed two periods of violent activity lasting 1200 and 300 years. Video: You Won't Like Her When She's Angry 2011-12-06T22:56:34Z We have to get more radiocarbon dates, more tree ring dates. Mystery artifact found on Alaska?s Seward Peninsula thought to be over 1,000 years old 2011-11-15T01:22:30Z At a few places we were able to get samples for grain size analysis and to find enough charcoal for radiocarbon dating. Scientist at Work Blog: TV Cameras and Falling Rocks 2011-08-11T22:15:59Z The Russian team says they obtained a radiocarbon date of 31,800 years from seeds attached to the same placenta from which the living plants were propagated. New Life, From an Arctic Flower That Died 32,000 Years Ago 2012-02-20T20:05:20Z We need a few different kinds of samples: undisturbed loess and flow deposits, radiocarbon, optically stimulated luminescence, bags of sediment and snails. Scientist at Work: Digging Around for Snails 2011-08-04T18:39:43Z When we find charcoal pieces and bones, we collect them for radiocarbon dating to control the age of deposits. Scientist at Work: Living Dangerously in Sichuan Province 2011-08-02T20:12:41Z A piece of leather wrapped around the rectangular bar gave a radiocarbon date of about A.D. Mystery artifact found on Alaska?s Seward Peninsula thought to be over 1,000 years old 2011-11-15T01:22:30Z They radiocarbon dated the hearth to the Mesolithic period, which started as the last Ice Age ended. Supermarket site 'was ancient rest stop' 2011-07-19T00:01:23Z Scientists used radiocarbon dating to determine the nine people died between the 13th and 15th Centuries. Castle skeletons had brutal death 2011-05-27T00:47:15Z The new radiocarbon findings show little evidence that the two species peacefully coexisted within Europe. Neanderthals and Early Humans May Not Have Mingled Much 2011-05-09T20:41:24Z The results are leading to a reevaluation of radiocarbon dates all over prehistoric Europe. Were Neandertals and Modern Humans Just Ships in the Night? 2011-05-09T20:01:00Z The team obtained the date of 9260 years ago for the coprolite by radiocarbon dating one of the prickly pear seeds inside. Earliest American Dogs May Have Been Dinner 2011-05-06T21:01:43Z By combining the study of these vessels with radiocarbon dates, we are trying to build a fine chronology of ceramics and ritual practices. Scientist at Work: Q. and A. on Maya Archaeology 2011-04-28T18:09:54Z The technique is "not as precise as radiocarbon by a long shot," Bamforth says. People Were Chipping Stone Tools in Texas More Than 15,000 Years Ago 2011-03-24T19:45:00.280Z Given the lack of sufficient organic material buried around the tools, the radiocarbon dating method was useless. Texas Arrowheads Dial Back Arrival of Humans in America 2011-03-24T18:28:57Z A new radiocarbon dating study of a Neandertal site in Russia concludes that the latter scenario is most likely, and that Neandertals and modern humans were probably like ships in the night. Were Neandertals and Modern Humans Just Ships in the Night? 2011-05-09T20:01:00Z That is just for the basic analysis and does not include more technologically sophisticated analyses, like radiocarbon dating and elemental analysis on ceramics. Scientist at Work: After the Field: Stones, Bones and Sherds 2011-03-10T21:19:40Z They were found in Gough’s Cave in Somerset, England, and are the oldest directly dated skull-cups known, based on radiocarbon analysis. Observatory: Skull-Cups in British Cave Conjure an Ancient Rite 2011-02-22T03:10:01Z So if no biological material was available for handy radiocarbon dating, researchers would have had no way to gauge exactly when an assemblage of tools was made. People Were Chipping Stone Tools in Texas More Than 15,000 Years Ago 2011-03-24T19:45:00.280Z Plant cultivation and animal raising started almost 8,000 years ago at Pokrovnik and lasted for close to a millennium, according to radiocarbon dating of charred seeds and bones from a series of occupation layers. Ancient Farmers Swiftly Spread Westward 2011-01-11T20:44:00Z After radiocarbon dated the structure to 8500 B.C. or earlier, researchers announced their finding last month. SCIENCE NEWS 2010-09-14T04:00:00Z One method scientists use to gauge how effectively ecosystems store carbon is radiocarbon dating. A River Flipped: Humans Trump Nature on Texas River 2010-08-18T14:27:00Z Pharaohs Are Given an Update A new study provides detailed information about the timeline of ancient Egypt’s Old, Middle and New Kingdoms using radiocarbon dating. Pharaohs Are Given an Update 2010-06-21T21:26:00Z Those elevated levels of radiocarbon were tracked carefully, and they began to drop off quickly after a test ban treaty was signed in 1963. The Radioactive Clock In Your Teeth 2010-05-21T16:00:00Z “We believe that lidar will help transform Maya archaeology much in the same way that radiocarbon dating did in the 1950s and interpretations of Maya hieroglyphs did in the 1980s and ’90s.” Using Laser to Map Ancient Civilization in a Matter of Days 2010-05-10T21:25:00Z "The measurements were done by three really good radiocarbon labs so I've no doubt what they measured is the correct age." Unshrouding the science of the Shroud 2010-04-12T10:09:00Z In a 2005 study, Masiello and colleagues used radiocarbon dating and found that the Amazon River, the world's largest, cycles carbon into the atmosphere in less than five years. A River Flipped: Humans Trump Nature on Texas River 2010-08-18T14:27:00Z The ceramic styles and radiocarbon tests date the wall to about 5000 B.C. In Syria, a Prologue for Cities 2010-04-05T20:24:00Z The finger bone was found in a layer laid down on the cave floor between 48,000 and 30,000 years ago, according to radiocarbon dating. Researchers Identify Possible New Human Group With DNA From Bone 2010-03-24T18:03:00Z Philon went on to explain the radiocarbon dating of the book. The House from Nowhere Some of the carbon compounds in the various artifacts showed a faint trace of radiocarbon, others showed none. Dead Giveaway Previous radiocarbon dating studies in cooler climates, like the U.S. A River Flipped: Humans Trump Nature on Texas River 2010-08-18T14:27:00Z MacDonald probably peddled his spurious first editions down on Front Street for a few hundred dollars to old bookstores unable to afford radiocarbon dating. The House from Nowhere The radiocarbon analysis fixes its age at a mere five or six years. The House from Nowhere Before I make any offer to you I shall have to radiocarbon date the book. The House from Nowhere |
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