Though *Sahelanthropus* is not definitively the oldest evidence of bipedalism, its anatomical features indicate a lean towards bipedalism rather than quadrupedalism. Some palaeoanthropologists ...

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He also stressed that the Ulas’ form of quadrupedalism differs from that seen in our closest animal relatives – chimpanzees and gorillas – in one key way. Whilst these primates walk on their knuckles, ...