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

A rather outlandish claim that an alien gun was spotted in a photo taken on Mars 12 years ago has drawn attention.

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

NASA's Mars Curiosity rover has uncovered never-before-seen organic compounds that could be the most convincing evidence yet that there was life on the red planet. The nuclear-powered robot uncovered ...

Results appear to contradict previous studies that claimed to have found traces of methane emanating from surface of planet ...

Nasa's latest Mars discovery brings us closer to finding alien life. Perseverance has found deep deposits of complex carbon ...

NASA has uncovered major new clues on Mars that could point to alien life. The space agency’s rover has found chemicals on the Red Planet that are widely considered the key ingredients for the origin ...