Adolescents are known for risky behavior, with teenagers in the U.S. more likely than younger children to die from injury. But what's responsible for this uptick in risk-taking around puberty? Our new ...

Humans owe their highly flexible shoulders and elbows to their ape ancestors, an evolutionary gift that once acted as a natural braking system for safe tree descent. According to a new study published ...

New research suggests that no matter what we eventually determine the last common ancestor of humans and chimpanzees to be, we'll learn it was a primate that climbed trees. Humans and chimpanzees ...

Learn how video footage of monkeys in West Africa has unlocked new answers in the debate over the last common ancestor of chimpanzees and humans. Before humans and chimpanzees split off into separate ...

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 ...