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

Originally built as early as 4000 years ago, this structure is just one of a larger network in the Salisbury Plain that ancient astronaut theorists believe are more than just ritual sites in this clip ...

K2-18b is one of the most promising worlds for the search for extraterrestrial life, so astronomers conducted an unusually ...

A group of astronomers has detected a sugar molecule swirling inside a cloud of gas and dust near the centre of our galaxy.

The exact timeline for the spacecraft’s display hasn’t been announced, but the artifact will fit into an upcoming exhibition on how humans have built a long-term presence in Earth orbit and laid the ...

Hollywood makes initiating alien contact seem much easier than it has proven to be. In E.T. the Extraterrestrial, E.T. got ...

Why do we tend to assume that UFOs are crafts carrying alien beings rather than alien beings themselves? How the UFO ...

Former Pentagon UFO investigator Luis Elizondo claims the US government possesses unreleased photographs showing what appear ...

Authorities, though, have a much more mundane explanation: space junk. The Australian Space Agency said the spheres are ...

A new study by Amirnezam Amiri of the University of Arkansas explores how these hypothetical "Dyson swarms" would appear ...

A Soviet astronomer in the 1960s proposed a scale to classify hypothetical alien civilizations. Here’s why the framework is ...

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