When danger approaches, many creatures seem to follow the ancient proverb that “the enemy of my enemy is my friend.” Researchers have recently been finding subtle ways that animals communicate with ...

The extent to which humans are monogamous has long been subject to debate. One scientist says studying sibling genetics gives a clear answer.

Modern humans belong to a small minority of monogamous mammals and, in terms of partner fidelity, rank between the Eurasian beaver and the white-handed gibbon. That's the conclusion of evolutionary ...