In June 1947, Kenneth Arnold saw something strange in the sky. What he saw sparked a national UFO craze-but it was far from the first time people have reported seeing inexplicable lights in the sky.

The Harvard astrophysicist has devoted years—and thousands of interviews—to the idea that mysterious objects streaking ...

Astronomers have recently started looking for black holes bigger than galaxies. Brian Lacki explains how these “stupendously ...

The pilots dubbed the fireballs “foo fighters” but had no idea what they were. Plasma? Enemy tech? Aliens? We still haven’t ...

Viral videos showing red beams before the Venezuela earthquake have sparked conspiracy theories. However, analyses reveal no ...

Craig Gillespie’s far-out adventure is something of a quirky oddity compared to bigger blockbuster outings – so why is it failing to fly at the box office?

If someone told you there’s a place in Wisconsin where the landscape looks like it was borrowed from another planet, you’d ...

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...