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Bipedalism - When We Branched Off From Chimps
This is tantalizing evidence and not surprisingly, it's really controversial. Chimps and gorillas are not actually bipedal. They can get up on two legs, but it's not a very efficient form of locomotion for them. And they knuckle walk. Usually when they're getting around, they're kind of on all fours, but the knuckles on the front arms are down on the ground. But what fossils we do have are not from knuckle walkers.
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