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

One of Britain’s most prominent space scientists believes humanity may finally get an answer to one of its oldest questions ...

From budgetary issues to wanting to recast Sigourney Weaver as Ellen Ripley, James Cameron’s version of Aliens almost never ...

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

Is 3I/ATLAS an alien probe? Breakthrough Listen uses the Green Bank Telescope to search for technosignatures as the ...

Mars. From forming black holes to phantom dark energy, discover the cosmic mysteries astronomers uncovered last year.

Polling shows that nearly half of Americans now believe aliens have visited this planet—and that the number who aren't sure ...

This has never been observed before. For the first time in history, scientists are watching an alien comet fall apart. The object comes from beyond our Solar System and has traveled for billions of ...

Unlike ʻOumuamua's eerie lack of coma or Borisov's more predictable gas cloud, 3I/ATLAS stayed stubbornly inert until late, ...

Europa has a vast, saltwater ocean beneath its icy shell, with more than twice the amount of water in all of Earth’s oceans ...

Is 3I/ATLAS a comet or an alien ship? Harvard's Avi Loeb warns of a 'serial killer' visitor as the interstellar object makes ...

A mysterious metal shard, once thought to be a piece of a UFO that crashed in 1947, has sparked years of wild speculation.