Aliens have long been a staple of science fiction. Yet the possibility of intelligent life beyond Earth is more than a matter of imagination—it is also a subject of serious scientific inquiry.

The search for extraterrestrial intelligence (SETI) is mostly concerned with where to look for technosignatures from another ...

Humans have wondered about life beyond our planet since ancient times, and researchers have worked hard for decades to find ...

Scientists searching for extraterrestrial intelligence are testing a new possibility: alien civilizations might transmit ...

Complex, intelligent life in the galaxy appears vanishingly rare, with the nearest possible civilization perhaps 33,000 light-years distant. Yet despite the odds, scientists insist that continuing the ...

In 1995, a pair of scientists discovered a planet outside our solar system orbiting a solar-type star. Since that finding—which won the scientists a portion of the 2019 Nobel Prize in ...

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 ...

A massive spaceship appears in the night sky. Communications are cut off, and cities around the world are attacked. Humanity rises above national borders to make a final stand against an enemy with ...

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 ...