The LHS 1903 system defies expectations with a rocky outer planet, prompting new ideas about how planets form and evolve.

Aristotle's views on the nature of the cosmos dominated the Ancient Greek world. He argued that there's only one world, at ...

A fictional theory created by H. P. Lovecraft ended up changing 2001: A Space Odyssey - and the world.

A new study proposes detecting life in space by spotting patterns across many planets instead of focusing on one at a time.

Behind the acid blood and jump scares of the Alien franchise is an even more insidious horror: a single employer with ...

The ideas in this particularly juicy conspiracy theory were considered impossible when it was first proposed, but they are ...