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 ...

A video, now viral on the social media, shows a bright object slowly falling from the sky over Indonesia, triggering claims ...

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.

For months, scientists and the public have squinted their eyes at photos of a blurry smudge to figure out if it’s proof that aliens exist. Discovered in July, 3I/ATLAS is not your average comet – it’s ...

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

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

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

A strange, tentacled object that went viral online was revealed to be a space-grown purple potato. Astronaut Don Pettit cultivated the unusual specimen during a microgravity gardening experiment, ...

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 ...

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