Because it's easier than walking on four. That's the basic finding of a study conducted by a team of researchers that included University of Arizona anthropologist David Raichlen. Its findings appear ...

The chimp with the most human-like gait and body type walked upright more efficiently than he knuckle-walked a finding that study co-author Herman Pontzer calls a snapshot of how this evolution may ...

Scientists argue ape-like Sahelanthropus tchadensis that lived in Africa 7m years ago is best contender but more fossils are needed ...

Walking around upright on two feet is something no other primate does routinely. It seems to be one of the earliest major shifts in the evolutionary path that eventually led to us, modern humans. But ...

A study on savannah-living chimpanzees suggests the need to move safely on thin tree branches could explain why early hominins that could walk upright kept their tree-climbing adaptations It’s hard to ...

SAN ANTONIO - Oliver, a chimpanzee known for his upright stature and humanlike traits, has died at a Texas wildlife refuge after spending much of his life in circus shows and research labs. Oliver ...