Alien pathogens or invasive species could hitch a ride on a spacecraft and invade our planet

If we don't watch out, alien microbes could invade Earth, or Earth microbes might crawl on an alien world

By Elizabeth Rayne 1 day ago

Bummer, that extraterrestrial signal from Proxima Centauri wasn’t aliens

Remember that strange signal from Proxima Centauri everyone thought was an extraterrestrial technosignature?

By Elizabeth Rayne 1 month ago

Good soup! Raw ingredients for life abundant in the swirling discs around newly forming planets

By Cassidy Ward 1 month ago

Heating up meteorites could tell us more about exoplanet atmospheres and potential for life

By Elizabeth Rayne 7 months ago

Could Enceladus' frozen subsurface ocean contain active currents?

By Jeff Spry 8 months ago

Are all the aliens hanging out in some eldritch realm deep underwater?

By Elizabeth Rayne 8 months ago

Perseverance is searching Mars for signs of alien microbes, but will we know if it finds them?

By Elizabeth Rayne 9 months ago

Could NASA start seeking out alien civilizations by hunting for air pollution?

By Jeff Spry 9 months ago

When we look out at alien worlds, are those alien worlds looking back?

By Phil Plait 1 year ago

New research paper theorizes there might be 36 alien civilizations in the Milky Way

By Jeff Spry 1 year ago