Braces, rubber bands, even jaw surgery—millions endure them in pursuit of a straighter smile. But were misaligned smiles ...

In romantic movies, kissing often symbolizes love, yet this simple act of pressing lips together has peculiar origins.

A lost chapter in human evolution has been revealed after an analysis of modern DNA found that we come from not one but two ancestral populations—ones that drifted apart and later reconnected ...

Modern humans have existed for more than 200,000 years, and each new generation has begun with a single cell—dividing, changing shape and function, organizing into tissues, organs, and limbs ...

Why are they so red, so sensitive and so prone to dryness? And why have humans evolved to have lips, when other creatures — birds and turtles, for example — get on just fine without them?

Their contributions may even go deeper—even to modern day faces. Genetic material from this now extinct crew influences the shape of human noses today, according to new research.

An analysis of genomes from some of the earliest modern humans to live in Europe reveals their ancestors interbred with Neanderthals in one period between 43,000 and 50,000 years ago.

An 8-inch rock found at an archaeological site in central Spain is the latest indication that Neanderthals were making art long before modern humans, further eroding stereotypes of the extinct ...

Early human evolution may have been more complex than scientists previously thought, with modern humans evolving from two ancestral lineages.

The basic outline of the interactions between modern humans and Neanderthals is now well established. The two came in contact as modern humans began their major expansion out of Africa, which ...

Neanderthals interbred with modern humans 47,000 years ago, passing down DNA that still exists in many modern-day people, according to two new studies.

T. rex had lips, upending its enduring pop culture image Whether carnivorous dinosaurs had lips has long been the stuff of paleo-debate. A new study finds evidence that flesh covered the predators ...