The federal government posted scores of never-before-seen files related to UFOs and UFO sightings on a new website. But the ...

Thomas Mulligan examines the scientific challenge of defining and searching for non-Earth-like alien life forms that may not ...

And when people are convinced that they know a secret, world-shaking truth, they are willing to wait a long time for ...

We have no idea what kind of life may exist on other planets, so it’s hard to know what to look for. Proxima Kósmos imagines a very different kind of solar system that could harbor life-forms we haven ...

Neil deGrasse Tyson is an astrophysicist who is the director of the Hayden Planetarium at the American Museum of Natural ...