NASA's Curiosity rover found pure sulfur crystals inside a rock after backing over and accidentally crushing it on May 30, ...

Avi Loeb’s White House panel has asked the Pentagon for videos and files on unexplained aerial sightings ...

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

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

In June 1947, Kenneth Arnold saw something strange in the sky. What he saw sparked a national UFO craze-but it was far from ...

NASA’s Perseverance rover has uncovered the most extensive evidence yet of complex organic molecules on Mars, detecting ...

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

I do think Elon Musk has been briefed into the program,” Coulthart said, referring to alleged Pentagon UFO retrieval programs ...

Astrobiologists think extraterrestrial civilisations grow so much that they hit crisis points, missing the chance to set out ...

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

NASA astronaut Anil Menon spoke with Newsweek's Leonardo Feldman about life in space, recently declassified UFO sightings, and future missions to Mars.