Washington (AP) – Humans early They used the animal bones regularly to make cutting tools 1.5 million years ago.
The newly discovered cache, which includes 27 carved bones and the sharpening of elephants and river mares on the Olduvai Gorge site in Tanzania pushes the date of the use of ancient bone tool by about a million years. The researchers know that the first people made Simple tools of stones Early from 3.3 million years.
the New discoveryWilliam Harkort Smith, an ancient scientist at the American Museum of Natural History, who did not participate in the research, said that old humans “had groups of tool more complicated before previously,” merged a variety of materials.
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It is possible that the bone tools are well preserved, with an area of about 16 inches (40 cm), by breaking the thick ends of the leg bones and using a stone to stop the chips from the remaining bone column. This technique was used to create one edge of sharpening and one pointed tip.
He said that bone tools “may have been used as a hand or hand” – a carcass that is not installed on a stick – for the same dead animals.
Such a blade will be useful for removing meat from the bodies of the elephant and the flower, but do not use as a spear point or a shell. “We don’t think they were looking for these animals. Maybe they were pouring.”
Some artifacts show signs that it has been hit to remove chips more than dozens of times, revealing continuous craftsmanship.
Mirian Pashiko, an ancient scientist at the University of Sao Carlos in Brazil, who did not participate in the study, said.
She added that the bone shows the minimum signs of corrosion, trample or invalidated by other animals – excludes the possibility that the natural causes led to the forms of the tool.
Orthopedic tools date back to more than a million years before our race, Homo Sapiens, was established, about 300,000 years ago.
At a time when the tools were made, three different types of human ancestors lived in the same region of East Africa, said Priyana Popiner, the old world of the human origins program in Smithsonian, who did not participate in the study.
Tools may be made and used by Homo Erectus, Homo Habilis or Paranthropus Boisei. “None of these three could have been, but it was almost impossible to know which one,” Popiner said.
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