The human capacity for rational thinking makes us unique among the animal kingdom, according to wise, old Aristotle. However, ...

A new study that examines how kissing evolved suggests that ape ancestors and early humans like Neanderthals probably locked ...

Denisovans, a mysterious human relative, left behind far more than a handful of fossils—they left genetic fingerprints in modern humans across the globe. Multiple interbreeding events with distinct ...

Researchers have found two important building blocks of human speech in wild chimpanzees, one of our closest relatives. A pair of studies finds that chimp communication includes both rhythmic ...

A similar disorganized attachment can occur in captive chimpanzees, particularly orphans who are raised by humans. A lack of a permanent caregiver can lead to this more fearful behavior. However, in ...

Grunts, barks, screams and pants ring through Taï National Park in Cȏte d’Ivoire. Chimpanzees there combine these different calls like linguistic Legos to relay complex meanings when communicating, ...

New research suggests chimpanzees can rethink their choices when new evidence emerges, a hallmark of human-like reasoning. Credit: Shutterstock A new study published in Science shows that chimpanzees ...

Human faces are famously flatter than those of other primates. Neanderthals, by contrast, had prominent, projecting midfaces ...

In the words of Dua Lipa, one kiss is all it took about 21 million years ago. That's roughly when scientists estimate that kissing first emerged in the common ancestor of humans and other great apes.