Infant chimpanzees are out of mom’s reach the majority of the time they descend from the trees. Kevin Lee/Ngogo Chimpanzee Project and Arizona State University Adolescents are known for risky behavior ...

In the quest to understand how and why early humans started walking on two legs, scientists are now looking to chimpanzees living in dry, open savannah-like environments for clues. A new study reveals ...

A study of chimpanzees in the mountains of Rwanda shows our nearest relatives adapt their nests to account for extremely ...

Toddlers are the daredevils of the chimp world. Chimps ages 2 to 5 are more likely than older chimps to free-fall from tree limbs in the forest canopies or leap wildly from branch to branch, ...

Every evening, as they move from place to place through the forest, chimpanzees stop to build a nest—most often in a tree—to sleep in. Using a selection of branches, leaves and twigs, they create ...

High in the montane rainforest of Rwanda’s Nyungwe National Park, chimpanzees spend the last light of each day bending and ...

A chimpanzee female (Pan troglodytes schweinfurthii) sleeps in a nest built in a tree in Uganda's Kibale National Park. The origins of human evolution might lie, in part, in the ancient transition ...

A mother chimpanzee looks out from the central tree to her breakfast (seeds!) at the end of thin branches. Image by Rhianna C. Drummond-Clarke/Greater Mahale Ecosystem Research and Conservation (GMERC ...