"Scientists are confident that life exists elsewhere in the universe. Yet rather than taking a realistic approach to what aliens might be like, we imagine that life on other planets is the stuff of ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life. Tardigrades—a type of invertebrate ...

A former CIA-linked physicist's comments about 'four alien species' have reignited UFO conspiracy theories online.

Claims of US government knowledge of multiple alien species resurface as former officials allege awareness, but Pentagon reviews find no evidence of extraterrestrial involvement.