Add Yahoo as a preferred source to see more of our stories on Google. Collage of a telescope under a starry sky and a planet in space. Earthlings, brace yourselves: the galaxy may be emptier than your ...

Advanced alien civilizations may communicate via a series of flashing lights, similar to how fireflies do, a new paper hints. This would potentially make extraterrestrials much harder to spot if we ...

Almost 13,000 years ago, a massive fragment of a comet exploded over Louisiana, turning stone into glass and potentially offering evidence for one of history's most controversial theories. New ...