Humans are the only primate whose breasts stay permanently enlarged. Here's what the fat, the hormones and the research actually say about why they stay.

We are the worst primates when it comes to wound healing, according to a new study. Our wounds heal nearly three times slower than those of chimpanzees, our closest living relatives, and other ...

Learn how human healing compares to healing in other primates and mammals, whose fur may help their skin stitch itself together. That scratch on your arm, that scrape on your knee — they’re taking ...

Scientists have long tried to understand the human brain by comparing it to other primates. Researchers are still trying to understand what makes our brain different from our closest relatives. Our ...

Sleep is often treated as a casualty of modern life. Artificial lighting, shift work, endless notifications and late-night entertainment are usually blamed for cutting into the hours people spend ...

Humans perceive emotional expressions displayed by non-human primates and spontaneously mimic these expressions, according to a study published in the open-access journal PLOS One by Ursula Hess from ...

Scientists have long thought humans have a uniquely difficult birth compared with other primates. And it's true that, from an evolutionary perspective, we face an obstetrical dilemma. As we evolved to ...

On dry nights, the San hunter-gatherers of Namibia often sleep under the stars. They have no electric lights or new Netflix releases keeping them awake. Yet when they rise in the morning, they haven’t ...

Researchers have widely accepted that what sets humans apart from nonhuman primates are prefrontal cortex–driven behaviors such as decision-making, reasoning, planning, and attention. In a new ...

Humans appear to be the only species clearly proven to shed tears specifically because of emotions. Elephants, primates, and dogs show behaviors and biological responses that come closest to human ...