A new study looks at how the mouth-on-mouth smooch came into being, and concludes that Neanderthals also kissed.

Kissing stretches back roughly 21 million years, to the shared ancestor of humans and other large apes, according to the ...

Humans spend a lot more time kissing than they do thinking about why they kiss. But scientists intrigued by this question say ...

Humans aren’t the only ones who kiss—monkeys do it, polar bears do it, and now research suggests that the practice may go ...

A new study led by the University of Oxford has found evidence that kissing evolved in the common ancestor of humans and ...

(The Root) — An African-American family is at the center of a discovery that researchers say pushes back previous estimates of how deep the roots of the human family tree are. Analyzing DNA provided ...

Common ancestor eels lost the aquaporin gene encoding proteins with broad solute permeability. Researchers from the Institute ...