Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

While 3I/ATLAS is definitely a comet, its composition and age have remained unclear. Now, astronomers have solved these ...

Stacker compiled a ranking of cities with the most UFO sightings in Texas using data from the National UFO Reporting Center.

Before anyone started calling sci-fi “prestige” or “elevated,” there was The Outer Limits — just grainy film stock, a hum in ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...