The United States is stepping back from the most direct test yet of possible alien biology on Mars just as new telescopes and ...

The first unmistakable signal from another intelligence may not be a cheerful greeting. A growing group of researchers is ...

While nobody really knows what an ‘alien’ looks like, Hollywood films and sci-fi novels often depict aliens as scary, supernatural beings. Typically they have a reverse teardrop-shaped head, buggy ...

The original version of this story appeared in Quanta Magazine. Life on other worlds—if it exists—might be so alien as to be unrecognizable. There’s no guarantee that alien biology would use the same ...

Is it the invasion of the genome snatchers? Just in case the idea of aliens walking around in human skin suits wasn’t frightening enough. An outlandish study asserts that aliens might have abducted us ...

A megacorporation's research ship returns from a 65-year mission into deep space loaded with gooey alien specimens. But—and stop me if you've heard this one before—something goes wrong. The ship ...