Roughly 3.5 billion years ago, Gale Crater on Mars held a lake. The sediments that settled at its bottom have been locked in ...

Astronomers can use telescopes to find specific molecules in the atmospheres of neighboring planets, in nebulae—clouds of ...

A tiny ancient reptile just revealed the moment breathing as we know it began — and it changed life on Earth forever.

A new therapy has the potential to cure hundreds of diseases — and even reverse aging. Credit...Photo illustration by Kensuke ...