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

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

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

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 ...

Former NASA UAP study member Mike Gold says US officials are quietly working to declassify more UFO material and urges ...

Get the latest federal technology news delivered to your inbox. You might think this column is about UFOs and the Pentagon's ...

The Outer Space Treaty bans nuclear weapons in orbit—but we currently have no way to verify that satellites aren't carrying ...

Star Trek's Prime Directive revolutionized the science fiction genre by promoting cooperation and non-interference with alien ...

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

With new technologies come new opportunities. And that is especially true in astronomy—with every new advanced telescope, we ...

A deleted scene finally explains the blockbuster’s most mocked plot hole, making its infamous alien hacking twist far easier ...

Research indicates airport radar systems may unintentionally broadcast Earth's presence to aliens up to 200 lightyears away, ...