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 ...

Researchers at the University of College London recently undertook a massive study to better understand chimps. The team analyzed data from fecal samples of 828 wild chimpanzees across 30 populations, ...

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 ...

In the 1970s, a chimpanzee named Oliver gained fame for looking and acting remarkably human. From upright walking to unusual facial features, he challenged what we thought we knew about evolution.