It’s a real space oddity. Former Pentagon UFO investigator Luis Elizondo claims the US government possesses unreleased ...

Investigating an area of interesting light rock seen from orbit, Curiosity found some particularly weird-looking structures.

In 1877, an Italian astronomer mapped faint lines on Mars and called them canali, meaning channels or grooves. But the word was mistaken for “canals,” and suddenly people believed Mars showed signs of ...

An image taken by Curiosity last month has sparked claims of a long-lost civilization on the Red Planet after some spotted a ...

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

The Outer Limits still feels remarkably modern, with eerie sci-fi stories that inspired generations of genre television.

A new Mars Rover image captured by NASA's Curiosity mission has reignited debate over whether unusual formations on the Red ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

Astrophysicist Neil deGrasse Tyson has a blunt request for the government as the Pentagon rolls out the highly anticipated UFO files — just “show the alien!” Tyson shared his two cents Monday on “The ...

The U.S. military released a new batch of files related to UFOs, including one report from a Navy pilot who said a mysterious ...

Astrophysicist Neil deGrasse Tyson is calling on the government to just "show the alien," arguing that after years of whistleblower hearings and Pentagon file dumps, the American public is ready to ...

Scientists have identified new clues that could help astronomers spot one of the most famous hypothetical alien ...