Finding life beyond our solar system goes beyond measuring an exoplanet's size, as rocky, Earth-sized worlds might not have ...

Alien planets are far away but extreme lasers on Earth are giving scientists a way to investigate what they're like.

Add Yahoo as a preferred source to see more of our stories on Google. For decades, humanity has scoured the cosmos for any signs that we aren't alone in the universe. But now, researchers at the SETI ...

Do little green men exist? Was 'Men In Black' a documentary? Prediction markets are pricing the probability of a U.S. government confirmation of alien life before the year 2027. Find out why traders ...