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

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

Scientists have uncovered a surprising way to study the harsh space weather around young M dwarf stars. Mysterious dips in ...

A strange purple object aboard the ISS sparked alien fears online, but NASA revealed it was a potato experiment. It shows how ...

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

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

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

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

reports of alien abductions and recovered memory syndrome or studies that don't reach traditional levels of significance. But neither controversial phenomena nor potentially illuminating but ...

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 ...

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