Rhesus macaques in U.S. research laboratories frequently pull out their own hair, pace in tight loops, and rock back and ...

It is not unusual for laboratory monkeys to engage in abnormal repetitive behaviors (ARBs), such as pacing and hair-plucking.

A recent study has shown how some species of monkeys have complex social hierarchies and how some are prone to taking risks ...

Adaptation and behavior in the primate fossil record / Callum F. Ross ... [et al.] -- Functional morphology and in vivo bone strain patterns in the craniofacial region of primates: beware of ...

Humans are far from the only primates engaging in same-sex sexual activity. A new study found instances in which 59 nonhuman primate species, including bonobos, chimpanzees and macaques, have taken ...

Cooperative behaviour and prosociality in nonhuman primates constitute a vital area of research that illuminates the evolutionary origins of complex sociality. Studies indicate that primates employ a ...

In a recent study by Kyoto University in Japan, researchers found that primates engage in socially contagious urination behaviors. Chimpanzees were observed to urinate around the same time throughout ...

Why the Latest Science Leads Us to a New Theory of Human Nature, by Jonathan Leaf (Bombardier, 320 pp., $21) Ever since Darwin, biologists have believed that much could be learned about human nature ...

For decades, scientists believed that bonobos, one of our closest living relatives, were among the most peaceful primates.

Spider monkeys live in fluid social groups that split and reform, allowing information about food sources to spread across the population. By moving between subgroups, individual monkeys help create a ...