A chimpanzee looks out of his enclosure as visitors trickle into Zoo Miami, Tuesday, Sept. 15, 2020, in Miami. Wilfredo Lee/AP hide caption
apes
The northern white-cheeked gibbon is a critically endangered ape native to China, Vietnam and Laos. Scientists have discovered a new species of gibbon, now extinct, that lived in China as recently as 2,200 years ago. Joachim S. Müller/Flickr hide caption
Rocky spent his first few years raised by people, and is particularly attuned to human speech and behavior, researchers say. But his remarkable ability to learn and match human pitch and common sounds of speech surprised them. Mark Kaser/Courtesy of Indianapolis Zoo hide caption
An example of a human precision grip — grasping a first metacarpal from the thumb of a specimen of Australopithecus africanus that's thought to be 2 to 3 million years old. T.L. Kivell & M. Skinner hide caption
Tilda the orangutan, relaxing between gabfests at the Cologne Zoo. Cologne Zoo hide caption
"I don't know if I'm the best at it, but I have a go." -Serkis on performance capture David James/Twentieth Century Fox hide caption
An endangered Sumatran orangutan with a baby clings on tree branches in the forest of Bukit Lawang, part of the vast Leuser National Park, in Indonesia's Sumatra island. Romeo Gacad/AFP/Getty Images hide caption