Is 3I/ATLAS a comet or an alien ship? Harvard's Avi Loeb warns of a 'serial killer' visitor as the interstellar object makes ...

On Friday, interstellar comet 3I/ATLAS makes its nearest approach to Earth. Here's what you need to know, and how to track ...

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 ...

A recent theory proposed by a NASA scientist suggests that extraterrestrial civilizations may not possess the wildly advanced technology that many UFO enthusiasts expect. This perspective, which ...

The interstellar object 3I/ATLAS, captured by the James Webb Space Telescope. Imagine an object sailing through the black void, a piece of cosmic shrapnel that was formed in a star system light years ...

Remember Steven Spielberg's 1982 film E.T.? The science fiction classic remains both delightfully funny and emotionally resonant in how it explores the connection a lonely young boy forms with a ...

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, ...