The third known visitor from another star system, Comet 3I/ATLAS, has been racing through the Solar System with just enough ...

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 ...

One million alien visitors from another star system could already be lurking in the solar system. We aren't talking about "little green men" here, however — more "little (and not so little) gray rocks ...

The Asteroid Terrestrial-impact Last Alert System (ATLAS) in Chile first saw this celestial wanderer on July 1, 2025. It is only the third interstellar object ever seen passing through our ...

Scientists baffled as 3I/ATLAS displays sun-locked jet with odds of natural alignment near zero As the winter solstice approaches, Earth is preparing for a brush with a high-speed traveller from the ...

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, ...