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 ...

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

When a scientific controversy or breakthrough dominates headlines, press officers and journalists often quote a handful of ...