High-energy particles zipping through the cosmos are harmful to life on Earth, but scientists think it could be food for potential alien life elsewhere. Saturn's moon Enceladus (shown here in a 2006 ...

Language and radio signals may not matter to aliens. Instead, they might be using patterns to leave a biological fingerprint.

In 1938, aliens attacked. Well, that's at least what Americans heard over the radio. Orson Welles and a group of actors ...

A new paper posits that advanced alien civilizations may communicate through subtle flashes, like fireflies do on Earth. The thought experiment suggests that we need to avoid human biases in our ...

SETI scientists have detected signals that don’t behave like anything found in nature — narrowband, repeating, and drifting as if something is moving fast. Could these be side effects of alien ...

The search for life beyond our solar system heated up this year when scientists reported a tantalising signal from an exoplanet of a molecule that is known to be produced exclusively by life on Earth.

Add Yahoo as a preferred source to see more of our stories on Google. Emily Blunt in Disclosure Day. (Universal Pictures) What would you do if you discovered that aliens were real, and a lot closer ...

Decades ago, a spacecraft suggested Saturn's largest moon, Titan, had an ocean. New observations suggest that the liquid may look more like slush. When you purchase through links on our site, we may ...

Science fiction has long speculated about the possibility of first contact with an alien species from a distant world and how we might be able to communicate with them. But what if we simply don’t ...