"It’s also possible that our last common ancestor already showed similar forms of ointment behavior." More research needs to be done to confirm orangutans' exact knowledge of their actions ...

Threats to orangutans come as the recent boom in research is revealing a surprising range in their genetic makeup, physical structure, and behavior—including the beginnings of cultural ...

Vandu and Raba are two Bornean Orangutans that have spent most of their lives in captivity at the Hong Kong Zoological and Botanical Gardens, a glaring juxtaposition from the their relatives in ...

Or, it could be a learned behavior. Orangutans are known to be capable of social learning. They're often observed "peering" at their group members, which is the act of getting very close and ...