The curious minds at What If explore what the world would look like if aliens brought life to Earth. Florida mom witnesses execution of daughter's killer 20 years later: 'It's done' Watch: Key results ...

A slender, elongated rock on the Martian surface. That's what NASA's Curiosity rover photographed in Gale Crater, where it has been operating since 2012. When UFO blogger Scott C. Waring resurfaced ...

The Justice Department has activated a special court that's never before been used to argue for the removal of a woman accused of supporting the Islamic State. Prosecutors detailed some of the ...

Are aliens real? Was Fox Mulder right all along? We examine the prediction markets to gauge if the U.S. government will confirm that aliens exist before January 2029. The prediction market on a U.S.

For the quickest way to join, enter your email below. We’ll send a confirmation email and sign you up to Space.com newsletters with the latest inspiration, expert advice and exclusive offers.