An image of Mars taken by NASA's rover has sparked theories that aliens may be hiding on the Red Planet.

Add Yahoo as a preferred source to see more of our stories on Google. An illustration of an exoplanet in an alien star system. New research suggests that radio emissions from intelligent aliens may be ...

Given the size and age of the universe, it should be full of species with technology far more advanced than our own. But so far there is no trace ...

Scientists have identified two possible exoplanets where aliens could have lived for five billion years before life on Earth ever began. The planets could exist in our own Milky Way galaxy and share ...

Alien invasion movies are fun, but an all-star cast makes them all the more appealing. Tune in as we compile the best ...

DO ALIENS pollute their planets? Let’s hope they do, as this would give us a promising way of spotting where they live. Radio noise may be too short-lived to help us find aliens, if our own activity ...

IS IT possible to tell whether a planet hosts life just from its glow? A new analysis of Earthshine, sunlight reflected off Earth then bounced back by the moon, suggests this is a viable way to seek ...