Primate social organization is more flexible than previously assumed. According to a new study, the first primates probably lived in pairs, while only around 15 percent of individuals were solitary.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Heated disagreements about sexuality and gender are front and center in ...

Researchers have shed new light on the features that enable tree-dwelling mammals to move effectively through their environments, providing insights into the evolution of the distinct upright postures ...

Female and male primates often form close bonds, but not purely out of affection. Close relationships usually evolve when there is a clear benefit for both parties, with protection and reproductive ...

A surprising new study suggests the earliest primates didn't originate in tropical forests but in cold, dry parts of North America. Some may have even survived seasonal Arctic conditions by slowing ...

Sleep is often treated as a casualty of modern life. Artificial lighting, shift work, endless notifications and late-night ...

WASHINGTON — Nonhuman primate research supported by the National Institutes of Health is critical to the nation’s ability to respond adequately to public health emergencies and carry out high-impact ...