Why did our ancestors start walking upright?tags: human evolution, CS Monitor, apes, bipedalism
Being four-legged has its perks. As a quadruped, your center of gravity is lower, there's less wind resistance when you're running, and, best of all, you can use your hind foot to scratch your ear.
All of this raises a big question: What were our apelike ancestors thinking when they started walking upright?
A prevailing hypothesis is that they were prompted by climate change. As African forests declined due to temperature fluctuations some 2.5 million years ago, the hypothesis goes, our australopithecine ancestors descended from the trees and ventured out into the open savanna, an environment thought to be friendlier for those standing on two feet....
comments powered by Disqus
- German Historian: Rich Greeks Evade Taxes Since 1830
- UK teaching "invented" history as EU propaganda, says Cambridge professor
- The move accelerates to show that black people have a history
- Eric Foner says he insisted on his MOOC on the Civil War being free
- Ellen Schrecker backs “National Adjunct Walkout Day” as a brilliant tactic