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 ...

Human history is littered with expired civilizations, and scholars and archaeologists have made a determined effort to ...

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 ...