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

Technosignatures are theoretical signs of technologically advanced alien civilizations, but so far, none of those civilizations have phoned home. Researchers from the Search for ExtraTerrestrial ...

Editor's note: The below contains spoilers for Alien: Earth Episode 5. Since Ridley Scott's Alien, the xenomorph and its various forms have been one of the most iconic movie monsters of all time, with ...