Given the size and age of the universe, it should be full of species with technology far more advanced than our own. But so far there is no trace ...

Sometimes, "unidentified" means just what it sounds like.

A planet with one side permanently roasting and the other frozen in endless darkness might still have a chance of supporting life. Researchers found that heat inside a tidally locked exoplanet could ...

Planets orbiting stars beyond the solar system come in all shapes and sizes but mostly fit into a few categories: large and hot gas giants, super-Earths that are slightly larger than our planet, ...

Sagan's team created the greatest puzzle of all time, which you can only solve if your species understands the basic nature of the universe.

A strange rock formation captured in NASA rover footage has ignited fresh viral speculation regarding alien life on the Red ...

The United States government's recent release of hundreds of previously classified unidentified anomalous phenomena (UAPs) cases spanning the 1940s to the present, along with the new Steven Spielberg ...

For the first time, astronomers have seen the glow of alien planets circling sun-like stars. “This is a new era,” says the leader of one of the teams, Drake Deming from NASA’s Goddard Space Flight ...

There is no chance in hell our species will be able to reach another Earth-like planet in the Universe in the foreseeable future, so the only way we can get a sense of the habitability of such places ...

Time works differently in space and on other planets, so the decade-plus that Alien Isolation fans have been waiting for the sequel might have felt like a blink of an eye on a different world. On ...

The United States government’s recent release of hundreds of previously classified Unidentified Anomalous Phenomena (UAPs) cases spanning the 1940s to the present, along with the new Steven Spielberg ...