Comet 3I/ATLAS, a rare interstellar visitor, is visible this week as it departs the solar system, with some public events ...

A Harvard University astrophysicist has sparked a furious debate by warning he cannot rule out that extraterrestrials are ...

Any time NASA notices something unusual traveling across the galaxy, we collectively perk up and give it our full attention. Speculation is rampant that alien life is coming to visit us here on Earth ...

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