Alien planets are far away but extreme lasers on Earth are giving scientists a way to investigate what they're like.

Hundreds of millions of years before dinosaurs, the tallest things on land were not trees or animals but towering, trunk-like organisms that looked like something from science fiction. Around 400 ...

Beneath our homes, highways, and oceans lies a part of Earth we will never see. About 1,800 miles down, at the boundary between the molten outer core and the solid mantle, scientists have identified ...

The idea uses a "starshade" to let astronomers find Earth-like exoplanets, even with existing ground-based telescopes.