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

A two-week expedition off Brazil's coast uncovered 31 previously unknown marine species, highlighting just how little is ...

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

A Catholic nun made a startling assertion about UFOs, cautioning that purported alien encounters are in fact a menacing ...

A siphonophore—a colonial marine invertebrate related to the venomous stinging Portuguese Man-o-war—is scanned using Deep ...

Could humans spread Earth life beyond our planet? Astrobiologists explain where extremophiles might survive and why the risks ...

Thus far, our search for extraterrestrial life points toward Clarke’s former point, suggesting that our little blue dot is ...

From the Greys to the Nordics, these aliens appear frequently across abduction stories and science fiction tales.

Researchers have wondered whether Praearcturus gigas was a giant crustacean called an isopod or some other creature. A new ...

Forests are home to some of the most strange and beautiful animals on Earth. Some feature elaborate branch-like antlers, while others have hauntingly glowing eyes, massive ears, or intricately ...

Frogs are often perceived as basic green or brown amphibians, but some of these pond dwellers look like they hopped right out of a science-fiction movie. They feature neon colors, transparent bodies, ...

A fossil of the creature provides the first evidence that microraptors lived in what is now northwestern China. Its discovery ...