Alien civilizations may have left traces. We just may not have been looking in the right place.

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

A provocative study suggests that Jupiter’s frozen moon Europa may not only be hospitable, but that life from Earth could be ...

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...

Could humans spread Earth life beyond our planet? Astrobiologists explain where extremophiles might survive and why the risks ...

A newly released Apollo 16-era NASA audio recording in Pentagon UFO files has reignited Moon conspiracy theories after a participant casually mentioned a possible “alien star base” on the lunar far ...

Grain-sized remnants of alien technology may get caught in solar wind and land on plants and moons close to us ...

Thus far, our search for extraterrestrial life points toward Clarke’s former point, suggesting that our little blue dot is ...

The best way to find alien technosignatures is to look for ones that have long survived their creators, according to a new paper.

Researchers say a biocontainment facility on the Moon could be humanity's last line of defense against potential future alien ...

NASA briefings mention an apparent "alien star base" on the Moon, the latest trove of UFO files has revealed. Audio from a previously classified NASA meeting following the Apollo 16 mission in the ...