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

Though this hunt came up empty, the fact that 3I/ATLAS is only the third known object found in the solar system after ...

The third known visitor from another star system, Comet 3I/ATLAS, has been racing through the Solar System with just enough ...

Interstellar visitor 3I/ATLAS sparked alien probe theories, fueled by Harvard scientist Avi Loeb's suggestions. However, ...

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 ...

Explore why the CIA issued a 'Glomar response' regarding the 3I/ATLAS interstellar object. Learn about Avi Loeb's theories on ...

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 ...

An international team of researchers pointed the largest single-dish radio telescope in the world at 3I/ATLAS.

Telescopes around the world are now tracking a new visitor to our celestial neighborhood. Streaking through at a speed and trajectory that not even the Sun's immense gravity can capture, we will only ...

There may be 19 asteroids in orbit around the sun that come from somewhere else entirely. If true, we could visit an alien 'world' without ever leaving the confines of the solar system. Share on ...