gibbons

Today’s A Moment of Science examines brachiation, which is how apes and monkeys swing through the trees. Orangutans, spider monkeys, and chimpanzees can brachiate, but gibbons do it most often.

When a landslide in China created a treeless gully in a forest, the apes who lived there had to leap dangerously across, or take a long detour through the trees. So scientists built them a bridge.