Between biosignatures and technosignatures lie noosignatures, and some scientists think they could help us find alien life someday.

Pulverised technology from collapsed alien civilisations may lie scattered across the solar system, including on the Moon, a new study suggests. The likelihood of advanced aliens living at the same ...

A fan theory on Reddit suggests that the creatures in M. Night Shyamalan's "Signs" aren't aliens, but actually demons. Here's why the theory makes sense.

In a new Astrophysical Journal Letters paper, researchers from the University of California, Riverside, describe these gases, which could be detected in the atmospheres of exoplanets — planets outside ...

The alien mothership makes contact with Earth in this scene from ‘Close Encounters of the Third Kind.’ Columbia Pictures Amy Adams attempts to communicate with a cephalopod-like, seven-limbed alien ...