The News
Chimp research gives evolutionary clues
DAVIS, Calif., July 20 (UPI) -- A study by researchers at the University of California-Davis on chimpanzees found clues regarding the evolutionary concept of walking upright.
By analyzing how a group of trained chimps used a treadmill, the California anthropologists said they gained a better idea of why apelike beings stopped walking on all fours and began walking on two legs, a news release from the school said Friday.
"When our earliest ancestors started walking on two legs, they took the first steps toward becoming human," lead researcher Michael Sockol said. "Our findings help answer why."

The Research
Read the research behind this story in the journal Proceedings of the National Academy of Sciences.