NASA officials have previously spoken of the possibility of extraterrestrial life amid scientific uncertainty while ...

The search for alien life often sparks the imagination with images of extraterrestrial beings and strange worlds. However, a new theory is shifting the focus—what if life elsewhere in the universe ...

Have you ever looked at a creature and thought, “This can’t possibly be from Earth”? That feeling becomes surprisingly common ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Over the past decade, scientists have come up with a variety of frameworks to guide ...