There are all sorts of things flying around the universe that we earthlings haven't yet figured out how to identify.

Scientists search for signs of alien life on a visitor from another solar system - 3I/ATLAS is the third known interstellar ...

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal interstellar body ...

Are some planets actually born from alien wanderers drifting through space? :milky_way: A new theory suggests that interstellar objects like comet 3I/ATLAS might be seeding young star systems, ...

Why are aliens always such a cliche? This one is a mockup of the Roswell Alien from the Museum of Science’s new exhibit, “The Science of Aliens,” which opens Sunday. Click through for more images, ...