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

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 ...

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 ...

Since its discovery, some people have speculated that interstellar visitor 3I/ATLAS could be alien technology. Harvard ...

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 ...

At a time of mounting public interest in UFOs, the SETI Institute is looking not to Earth to find signs of advanced alien lifeforms, but to the vast cosmos. But researchers at SETI aren't interested ...