Scientists have found new evidence suggesting that interstellar 3I/ATLAS is not an alien spaceship, as one conspiracy theory claims, but a comet.

The United States is stepping back from the most direct test yet of possible alien biology on Mars just as new telescopes and probes are racing ahead to hunt for life light‑years away. Lawmakers have ...

There’s no denying the allure of alien artifacts. Science fiction is awash in the material remnants of extraterrestrial civilizations, which surface in everything from the classic books of Arthur C.

Last week’s movie conversation was all about a certain very high-priced vanity documentary with a ginormous promotional ...

If true, the idea would blow past one of physics’ most sacred limits: that parallel versions of reality can never talk to ...