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
- Russian History Receives a Makeover That Starts With Ivan the Terrible
- Parsing Ronald Reagan’s Words for Early Signs of Alzheimer’s
- Here's a look at history of 'religious freedom' laws
- ‘Hamilton’ Puts Politics Onstage and Politicians in Attendance
- Earth Tectonic Plate Simulation Reveals Our Planet Has Changed A Lot In 200 Million Years
- Historians make it easy for visitors to DC to understand the history of the Mall
- History's Grandin Wins Bancroft Prize for "The Empire of Necessity"
- Nobel prize-winning scientist writes a history of science
- Ken Burns tackles history of cancer