Some mysteries refuse to be solved, no matter how hard we search. Join us as we look at some of the most baffling ...

Aliens, Arrival, Nope, Predator, Lilo & Stitch, E.T. the Extra-Terrestrial, and more make up our list of the best alien ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

Earth is dotted with humongous, human-made structures that, to an alien eye, may be tell-tale signs of intelligent goings-on.

This enigmatic orb has undergone extensive examination and DNA testing, enabling scientists to reveal its true origins ...

A string of so-called "mysterious deaths and disappearances" prompted speculation that the incidents were connected.