The controversial Harvard astronomer is one of the main sources of the "alien mothership" hypothesis. This is what he thinks, ...

For more than a century, popular culture has trained us to picture extraterrestrials as bug-eyed, bipedal “little green men” ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Historically, many scientists and society have been fascinated by the prospect of making contact with extraterrestrial ...