If I were looking at Earth from a distance, I would be pretty disappointed,” theoretical physicist Avi Loeb says. The debate on whether little green men or UFOs are among us escalated in February ...

Whenever Steven Spielberg looks to the skies and ponders whether intelligent life is lurking out there in the cosmos, we tend to get a cinematic classic. "Close Encounters of the Third Kind" and "E.T.

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.