NASA's Mars Reconnaissance Orbiter took this photo as Perseverance crossed the 42-kilometer finish line—or is it a starting ...

A University of Arizona-led team using a camera orbiting Mars has captured the closest images yet of an interstellar comet so rare that it has sparked wild speculation about its alien origins. The ...

Do little green men exist? Was 'Men In Black' a documentary? Prediction markets price the odds of the U.S. confirming aliens before 2027 - here’s why traders overwhelmingly expect a government ...

A new study into the 3I/ATLAS interstellar comet points to it having been born as far back as 12 billion years ago in a very ...

Characterized by a focus on scientific plausibility and technical detail, the hard sci-fi genre has produced some of the best ...

Stacker compiled a collection of 70 images that show how the '70s changed the world. See photos of the decade's defining ...

CAPE CANAVERAL SPACE FORCE STATION — NASA and Blue Origin are planning to launch the ESCAPADE mission, where a pair of satellites will study Mars' magnetosphere. ESCAPADE will eventually help future ...