Other branches of early humans, not just ancestors of Homo Sapiens, used them to cut and crush food.
The excavation site in Nyayanga where hundreds of stone tools dating to roughly 2.9 million years ago were found
The tools were used to butcher hippos and pound plant materials like tubers and fruit, the researchers said.Scientists had previously thought that Oldowan tools, a kind of simple stone implement, were only used by ancestors of Homo Sapiens, a grouping that includes our species and our closest relatives.
"With these tools you can crush better than an elephant's molar can and cut better than a lion's canine can," said
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