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

In the 21st century, the theories regarding the existence of aliens refuse to dial down. Now, the recently resurfaced NASA photo of Martian planet has gone viral on various social media ...

The strangely shaped object - snapped by NASA's Opportunity rover - has resurfaced and reignited wild theories about little ...

A new survey of hundreds of astrobiologists reveals that, despite NASA's high-profile declarations about Mars and exoplanet K2-18b, most experts do not yet think alien life has probably been found.

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

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

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