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
- Theodore Van Kirk, 93, Enola Gay Navigator, Dies
- The beautiful, historic shrines that Islamists try to destroy
- East Germany's Blood Art: No Justice for Victims of Regime's Treasure Hunt
- President Warren Harding’s Love Letters Open to the Public
- Earth Is In The Early Days Of A New Mass-Extinction Event, Researchers Warn
- Historian: Proclamation Naming Pa. State Gun Gets Facts Wrong
- Irish slave owners were compensated historian reveals
- Two historians are in a race against time to preserve early church records from destruction
- Yale's Jay Winter sums up what we should remember about WW I
- Plagiarism scandals galore … but no consequences?