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

(cokada/iStock/Getty Images) Alien megastructures built to harvest stellar energy or alter the orbits of stars may be ...

Scientists have uncovered a surprising way to study the harsh space weather around young M dwarf stars. Mysterious dips in starlight turned out to be massive rings of plasma swirling in the stars’ ...

A strange purple object aboard the ISS sparked alien fears online, but NASA revealed it was a potato experiment. It shows how microgravity can turn ordinary plants into bizarre shapes.

“They’re not extraterrestrials. They’re dolls made from animal bones from this planet joined together with modern synthetic ...

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

Renowned science fiction creator Ridley Scott helmed an 18-episode series that served as the perfect sequel to his ...

Debunking alien claims matters, but so does telling richer, more compelling stories about how humans shaped their own past.

A strange, tentacled object that went viral online was revealed to be a space-grown purple potato. Astronaut Don Pettit ...

These movies are the pinnacle of 70s sci-fi and the hard science fiction subgenre - priortizing scientific accuracy over ...

Aliens did not visit Earth in the distant past. They didn't build the pyramids or rule ancient Greece from Mount Olympus or teach Mesoamericans how to plant corn. How do I know? Because they didn't do ...