Re:No One Knows Why Humans Can Walk
by rriepe on Thursday October 17, 2019 @01:18AM
(#21279114)
This article glosses over it but I think the answer is cooking. Cooking took pressure off our digestive system which allowed us to stack it up vertically.
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Richard Wrangham wrote a book on this "Catching Fire: How Cooking Made Us Human"
I think that's a trong contender for biggest contributer.
Natural food was was less calorie dense back then. I wonder if we reached a point where we could consume the most calories per pound of our own body weight, and never looked back.