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

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.

NASA wants to send an ambitious fleet of helicopters to soar through Martian skies—but scientists fear the endeavor could ...

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

NASA's Mars Reconnaissance Orbiter took this photo as Perseverance crossed the 42-kilometer finish line—or is it a starting ...

Two scientists want NASA to build a quarantine lab for alien germs on the Moon, rather than on Earth. The pair, ...

NASA has unveiled its ambitious plan to build the first permanent human base on the Moon’s South Pole. The project will ...

A biologist specializing in invasive species has partnered with a former Pentagon strategist in pushing NASA to construct a ...

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.

NASA's Perseverance rover has uncovered one of the most intriguing clues yet in humanity's search for life beyond Earth. While exploring an ancient river valley on Mars, the rover detected complex ...

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 ...