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

New SETI research suggests space weather like solar winds could be interfering with alien radio signals, making them harder to detect.

Star Trek is packed with all sorts of alien, both on the Enterprise and throughout the final frontier, and these are the ...

Before zombies shambled about, ghoulishly feasting on the flesh of those too slow to flee, aliens from outer space ruled ...

Movies like "Disclosure Day" and "Project Hail Mary" renew our fascination with extraterrestrials and the idea that humankind ...

Stepped-up interest in UFOs also is swirling as the United States heads back toward the moon with Wednesday's launch of ...

Trump has ordered a UFO data release. But if aliens exist, what would they think of us? - For generations, human beings have ...