When astronomers observe distant exoplanets, they sometimes encounter a frustrating result: instead of revealing the chemical fingerprints of an atmosphere, the data appear almost completely flat.

It was the late 1950s when Ruben Uriarte saw his first UFO — a silvery, oval-shaped object hovering by the Oakland foothills.

In M. John Harrison’s​ short story ‘The Crisis’, first published in 2017, the world has been invaded by aliens that look like ...

At nearly twice Earth's size with a denser atmosphere, this fictional world hosts creatures that dwarf anything alive today, ...

Chilling Reasons We Haven’t Made Contact With Aliens Yet For decades, the idea of making contact with extraterrestrial life ...

Red and white dwarfs may turn out to be the most promising objects for searching for hypothetical Dyson spheres, systems ...

The Pentagon has released a 2020 UFO video, sparking renewed debate over its origins. The footage, part of a broader ...

The Pentagon has released 40 new declassified UFO files, including decades-old military reports, videos and images ...

Scientists have identified new clues that could help astronomers spot one of the most famous hypothetical alien ...

Alienware’s latest 34-inch ultrawide gaming monitor is far brighter than before, and it can finally handle text without ...

Eventually, we'll launch a mission dedicated solely to studying an interstellar object. When that day comes, which one should ...

Astronomers have identified GJ 3378b, a super-Earth located 25 light-years away, in the habitable zone of its star, raising ...