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junegoesaround5689 t1_iwt1e65 wrote

Reply to comment by updn in I saw in a video that chimpanzees and gorillas do not knuckle-walk in the same way, but they didn't explain what the difference is. Could someone elaborate on the physiological/anatomical differences? by [deleted]

The upright stance developed more than a million years before adaptations for long distance running. The running adaptations happened around the homo erectus timeframe ca 2 million years ago. The bipedal/upright adaptations occurred in the ardipithecus to australopithecus timeframe ca 4.5 to 3 million years ago with some going back even further.

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