| 单词 | radiocarbon dating |
| 例句 | 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 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 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 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 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 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 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 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 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 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 “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 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 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 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 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 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 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 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 “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 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 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 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 “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 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 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 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 But it will take radiocarbon dating to know for sure. 10 Mummified Crocodiles Emerge From an Egyptian Tomb 2023-01-18T05:00:00Z 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 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 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 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 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 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 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 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 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 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 Burleigh, R. W. F. Libby and the development of radiocarbon dating. An Introduction to Geology 2017-01-01T00:00:00Z 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 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 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 “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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 “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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 Next, they used radiocarbon dating to determine the age of the tooth. 'Neanderthal' Remains Actually Medieval Human 2013-12-30T23:45:00.402Z 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 “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 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 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 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 |
| 随便看 |
|
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。