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With over decades of films and convincing radio plays, aliens have captivated our imaginations and our worst fears. They’ve ...

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 ...

Are we alone in the Universe? With more than 100 billion galaxies in the observable universe and at least 500 billion planets ...

Thousands of people have reported UFOs or alien encounters in Northern California. That number could soon go up.

Project Hail Mary, Solaris, and The Hitchhiker's Guide to the Galaxy are all among the very best sci-fi books set in space.

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

Brought to life by the maestro Christopher Nolan, ‘Interstellar’ is a sci-fi space drama film set in 2067, a dystopian future in which Earth is dying, crops are failing, and dust is making human life ...

"We have captured imagery that, based on the data that we have within that imagery, we don't know what it is." ...

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

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