Ancient historians like Livy and Plutarch wrote of bizarre phenomena in the skies above Italy, from strange discs and phantom ...

A mysterious object from another star system is racing through our Solar System, and every major space telescope is watching. The more astronomers learn about 3I/ATLAS, the stranger it becomes.

A newly spotted interstellar visitor just got an unusually close listen from California scientists — in a search for signs of technology. The verdict was less science fiction than some might have ...

This article contains spoilers for the film Disclosure Day. As much as Steven Spielberg likes aliens, he seems to prefer holding them at arm’s length. The creatures in Close Encounters of the Third ...