Spaceships are a staple of big-screen sci-fi, from recent superhero movies back to early 20th-century films. Here are some of the all-time most iconic.

Astrophysicists have presumed for nearly a century that the universe will just keep expanding for all eternity, driven by an ...

An analysis of the afterglow of the big bang sheds light on how black holes distribute mass in the universe, and why some ...