Why did our ancestors start walking upright?Breaking News
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
- Conservative historian Arthur Herman slammed for saying Obama is highly submissive to Putin and other strong leaders
- Intellectual historians to gather in October
- Yuri N. Afanasyev, Historian Who Repudiated Communism, Dies at 81
- History professor gives Pittsburgh, PA columnist an “F” for a op ed on slavery
- Sharon Ullman says the work of historians is becoming increasingly invisible