Why did humans start walking upright?
Why our ancestors started walking upright has been one of the big mysteries in human evolution. There have been various theories but we didn’t know for sure. Now researchers have studied chimpanzees — who are relatively similar to our ancestors from 6 million years ago — and discovered that they will walk upright more when they are carrying scarce, high-quality resources.
Why humans began walking upright
If you’re interested in learning more about our ancestors, I highly recommend the BBC series Walking With Cavemen.