Our species, Homo sapiens, has been evolving for more than 300,000 years, but the story of human origins starts much earlier.

A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating ...

Genetic variants believed to cause blindness in nearly everyone who carries them actually lead to vision loss less than 30% ...

Our best models of the cosmos don't add up — but that could change if the universe is actually made of a viscous 'fluid,' a ...