An unusual sighting in a NASA image has reignited speculation that something extraterrestrial once existed on Mars.

The organic molecules could come from life or from ordinary chemistry — only samples returned to Earth can settle it.

Photos of amazing, almost unreal places Who needs fantasy? Earth is full of “alien planets” and surreal beauty beyond ...

The open-air museum concept is rather unusual as it does not present the history inside but recreates it in the landscape, ...

The designer behind Ultima Online and Star Wars Galaxies wants you to govern, exploit, protect, and transform your own planet ...

In 1776, as colonists along the Atlantic declared independence from Britain, the only people in the Coachella Valley were ...

Beneath the icy silence of Antarctica's famous Dry Valleys lies a world so unusual that it often resembles another planet.

Stacker compiled a collection of 70 images that show how the '70s changed the world. See photos of the decade's defining ...

When people think of U.S. national parks, iconic spots like Yellowstone, Yosemite and the Grand Canyon often come to mind.

A telescope built to protect Earth from asteroids accidentally discovered 3I/ATLAS, only the third interstellar object ever ...

The icon captured the moment the rap superstar combed out his locs after eight years of growth while detailing his meaningful ...

The worst case was the hanging murder of Robert Paul Prager in Collinsville. Many German-Americans served in the American ...