Is alien life really out there? For decades, humanity has looked at the night sky and asked the same question. Now, according ...

From insects to the moon, people have mistaken very Earthly phenomena for UFOs many times.

From the Greys to the Nordics, these aliens appear frequently across abduction stories and science fiction tales.

The recent discovery of an enigmatic substance on the surfaces of both Titan, Saturn’s largest moon, and Pluto, our solar ...

Moon bases, living to 100 and (finally!) flying cars. What 2076 and our future will look like may be stranger than we expect.

In June 1947, Kenneth Arnold saw something strange in the sky. What he saw sparked a national UFO craze-but it was far from ...

Is the rest of the cosmos a pristine environment awaiting the arrival of humanity’s “post-human” descendants? Or is advanced ...

The long-running series in which readers answer other readers’ questions comes up with an epic extraterrestrial playlist for Earth’s first contact from beyond the stars ...

Upon Cardinal Robert McElroy’s promotion to the post of archbishop of Washington, I authored an article titled “The Devil in D.C.” That should provide some indication of my thoughts on McElroy. The ...

A Stanford scientist's model suggests many small rocky planets can't sustain atmospheres, potentially explaining the scarcity ...