The riskiest behavior in humans peaks in adolescence. Researchers from the University of Michigan and James Madison ...

A similar disorganized attachment can occur in captive chimpanzees, particularly orphans who are raised by humans. A lack of a permanent caregiver can lead to this more fearful behavior. However, in ...

Researchers have found two important building blocks of human speech in wild chimpanzees, one of our closest relatives. A pair of studies finds that chimp communication includes both rhythmic ...