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

New theoretical models have strengthened the case that immense, energy-harvesting structures orbiting their host stars could ...

Sputnik skies to analysis of interstellar visitors, scientists are rethinking how and where to look for physical traces of ...

Language and radio signals may not matter to aliens. Instead, they might be using patterns to leave a biological fingerprint.

Tiny delays in pulsar signals measured by SETI scientists could aid the search for gravitational waves and extraterrestrial ...