The strangely shaped object - snapped by NASA's Opportunity rover - has resurfaced and reignited wild theories about little green men on the Red Planet ...

Scientists in a recent breakthrough have discovered vast hidden magma systems beneath the surface of Mars, marking an “unexpected discovery” leading the researchers closer to finding ...

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

Scientists now believe life may be found on the notoriously inhospitable planet of Venus – but they believe it will have come ...

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

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

Edward Leedskalnin was a tiny Latvian guy who got his heart broken and decided the appropriate reaction was to build an ...

WASHINGTON (AP) — A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White ...

WASHINGTON (AP) — A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the White House to lead a team of outside scientists to study the national security ...

In 1947, pilot Kenneth Arnold's report of strange objects over Mount Rainier and a fateful media misquote created the 'flying saucer' and reshaped UFO history.