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

Harvard's Avi Loeb argues 3I/ATLAS shows signs of alien technology, from its 0.2% probability flight path to bizarre metal ...

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 ...

With 3I/ATLAS streaking away from our planet, speculation remains as to whether the interstellar comet is alien or not.

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

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

Scientists have discovered 26 previously unknown bacterial species living inside NASA’s ultra-sterile spacecraft assembly ...

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.