| 单词 | biface |
| 例句 | He also showed a photo of a “biface” stone implement — spherical at one end, triangular at the other — and he noted that humans sculpted similar tools 1.8 million years ago. Is Geometry a Language That Only Humans Know? 2022-03-22T04:00:00Z In the hole, the divers found stone tools including an inch-wide, several inch-long stone knife and a “biface” – a stone flaked sharp on both sides. Sinkhole discovery suggests ancient humans in Florida 14,500 years ago 2016-05-14T04:00:00Z They excavated stone tools including a biface, a stone knife useful for butchering animals, and bones of extinct big mammals including camels, bison, horses and mastodons. Remarkable evidence of ancient humans found under Florida river 2016-05-13T04:00:00Z So when one her team members uncovered an ancient stone tool called a biface, Halligan was ready. Ancient stone tools are ‘best’ evidence yet for early peopling of the Americas 2016-05-13T04:00:00Z The excavation also revealed thin, unbroken strips of sediment dominated by shells; if the biface had drifted down from a younger layer, it is exceedingly unlikely those delicate sediments would have remained intact. Ancient stone tools are ‘best’ evidence yet for early peopling of the Americas 2016-05-13T04:00:00Z Over the course of two seasons, Halligan and Waters discovered butchered mastodon bones and a handful of other stone tools, though none as old or technically impressive as the biface. Ancient stone tools are ‘best’ evidence yet for early peopling of the Americas 2016-05-13T04:00:00Z But between the radiocardon dates and the painstaking stratigraphy, the researchers went above and beyond in proving that the biface is indeed 14,550 years old, Davis says. Ancient stone tools are ‘best’ evidence yet for early peopling of the Americas 2016-05-13T04:00:00Z 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 |
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