Relatively little is known about Denisovans, an extinct group of human cousins that interacted with Neanderthals and Homo sapiens.

Human and physical features are things that you can see all around you. Physical features like seas, mountains and rivers are natural. They would be here even if there were no people around.

Waste generated by human activities has now reached the deepest point in the Mediterranean: the 5,112-meter-deep Calypso Deep ...

Since 2007, more than 20 severed human feet have mysteriously washed ashore along the Salish Sea, sparking theories of natural decomposition, tragic accidents, and even a lurking serial killer.