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

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 relic from the beginning of the galaxy has finally come out of the sun's shadow. It gives us a rare look at a cosmic ...

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 ...

Interstellar comet 3I/ATLAS makes its closest approach to Earth this week, sparking alien theories and global interest as ...