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 ...

When the most dramatic close-up of an alien visitor remains behind the closed door, the vacuum is quickly filled. This has become the case with the comet 3I/ATLAS which is one of the rare bodies in ...

On July 1, 2025, astronomers caught sight of a mysterious object racing through the solar system. This object, now named 3I/ATLAS, became only the third known visitor from outside our planetary ...

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 ...