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 ...

Confirmation of alien life would answer one enormous question and immediately create dozens more. Humanity’s reaction would ...

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

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 ...

The first unmistakable signal from another intelligence would rank alongside fire and writing in the story of our species, yet a growing group of researchers warns that such a moment might arrive not ...

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 ...

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 ...

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

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

Elon Musk’s plans for the future of SpaceX, and humanity, are rooted in an idea conceived in the 1960s when astronomers began to pick up mysterious, unknown radio sources in the cosmos. Soviet ...