From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

The Perseverance rover has been exploring Jezero Crater for years, but it's never found an otherworldly object quite like ...

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

NASA's MAVEN spacecraft went dark earlier this month while it was observing 3I/ATLAS, which some thought was an alien ...

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An alien doorway on Mars, as captured by Mast Camera (Mastcam) onboard NASA's Mars rover Curiosity on Sol 3466 (image courtesy NASA) Scientists and David Bowie have all famously wondered if there is ...

A comet that is likely much, much older than our solar system has spent months traipsing through Earth's cosmic neighborhood. And at long last, NASA has unveiled an unprecedented look at the object, ...

A mysterious interstellar comet known as 3I/ATLAS is about to make its closest approach to Earth in December 2025. Here's ...

Scientists in Boulder are using existing NASA spacecraft to track a rare interstellar comet called 31/ATLAS as it travels through Earth’s solar system.

Elon Musk reveals his shock UFO theory: they aren't aliens but secret government weapons. Plus, the grim biological truth ...

The mystifying 3I/ATLAS interstellar comet is blazing toward Earth and will in a matter of days come as close to our planet ...