The curious minds at What If explore what would happen if you mated with an alien.

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals . Unexplained gases on other planets. Things mistaken for UFOs ...

For your extraterrestrial viewing needs, Stacker ranked the top 30 alien movies, according to their IMDb user rating.

Could aliens exist without DNA? Explore the complex role of DNA and its alternatives in the universe. As we uncover the ...

Some sci-fi movies get better as time go by, developing cult followings that recognize how relevant they remain decades later ...

Tens of thousands of years ago, Homo sapiens coexisted with Neanderthals, Homo neanderthalensis. Many of us living today ...

Scientists have long known that ancient Homo sapiens and Neanderthals lived alongside each other for thousands of years—until ...

Video game endings were leaving a mark on players long before the medium fully embraced cinematic storytelling. Even in the ...

Some of the best sci-fi TV of all time happened on shows that were raunchy, over the top, and downright scandalous. To prove ...

Alternative facts have always been with us, and they've always been used to cover up uncomfortable truths. Here's some history you'll want to rewrite in your memory.