From moon hotels and billionaire space tourism to SETI’s 21-year search for alien technosignatures, and a censored UFO ...

'The X-Files,' which stars Gillian Anderson and David Duchovny as Dana Scully and Fox Mulder, has many underrated episodes that need more attention.

For fans of "The X-Files" who watched the seminal '90s show live as it aired, the biggest mystery wasn't actually what happened to Mulder's sister: It was what happened to the show after Season 7.

Fans of "The X-Files": We'd like to present the cream of the crop (circle). Fox's alien-obsessed sci-fi series ran for nine seasons in the 1990s and early 2000s, then returned for two revival seasons ...