A reconstructed head of Australopithecus afarensis for an exhibit at the Smithsonian's National Museum of Natural History. John Gurche/SmithsonianHumans Left Trees 4.2 Million Years Ago -- Discovery News
Wrist bones of human ancestors reveal when humans switched from living in trees to on the ground.
* Fossilized wrist bones suggest humans switched from trees to a terrestrial lifestyle between 4.2 and 3.5 million years ago.
* Tree dwellers experience more stress on the pinky side of their hands while terrestrial species tend to load more stress on the thumb side.
* The timing of the switch coincides with climate and habitat changes and a shift in diet.
Read more ....
My Comment: We've gone a long way in 4.2 million years.
No comments:
Post a Comment