Intelligent alien life has remained elusive despite decades of searching the skies, but new technologies and ideas are ...

Experts believe ancient alien civilizations have been living on mars. See more in this clip from Season 1, Episode 7, ...

Suppose an alien civilization discovers Earth and decides to investigate. Before it chooses a landing site or considers how ...

Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

Add Yahoo as a preferred source to see more of our stories on Google. Distance, light speed, biology, and time may explain why alien civilizations never meet. (CREDIT: Wikimedia / CC BY-SA 4.0) "There ...

For decades, science fiction writers have tried their best to prepare us for eventual contact with aliens. Their efforts are dominated by several recurrent tropes. There's the invasion by a warlike ...

In the coming month, humans are going to experience their first encounter with an alien civilization as predicted by blind ...

The mathematical certainty that 'they' definitely exist in the universeWhen looking up at the night sky, everyone has surely ...

John Brandenburg—a plasma physicist at an aerospace development company—argues that there was an alien civilization on Mars. He cites data from NASA’s Curiosity rover, claiming that xenon levels on ...

A new study proposes searching the moon for remnants of ancient extraterrestrial technology. Researchers suggest the moon's surface could preserve microscopic "technosignatures" left by alien ...

For decades, SETI researchers have focused on finding narrow-band radio signals that might stand out from the natural universe. But what if an advanced civilization that wanted to communicate would ...