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Previous research has shown that the oldest known use of stone tools is by Oldowan hominins ... the chimps use when choosing rocks for cracking open nuts. To crack open a nut, a chimpanzee ...

Chimpanzees use rocks as tools for cracking nuts Stone selection by chimps mirrors ancient human ancestor techniques Generational learning observed in chimpanzee tool ...

The Oldowan tools—dated to between 2. ... the researchers wanted to investigate the patterns of stone tool selection for the purposes of cracking nuts by wild chimpanzees at Bossou in Guinea ...