Searching for alien signals sounds like a question of which star to aim a telescope at. It’s also a question of when to listen, because a civilization sending a focused radio beam toward Earth might ...

A radio signal from a star 238 light-years away briefly looked like it might be a sign of alien life, but the astronomers who found it say it’s more likely coming from somewhere on Earth. The signal ...

Finding a signal from an extraterrestrial civilization takes more than just pointing a telescope in the right direction. We ...

Scientists searching for advanced alien civilizations have detected a mysterious signal in data from the world's largest ...

When we think of extraterrestrial intelligence that might be out there among the stars, we tend to think of creatures not too ...

Add Yahoo as a preferred source to see more of our stories on Google. A high-frequency SETI search using ALMA opened new radio bands and showed that past surveys may have covered millions more stars. ...

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more natural source. In a series of papers, astronomers have compared the "Wow!

Just over 40 years ago, in his novel Contact, astronomer Carl Sagan imagined what it would be like to detect radio signals beamed from other intelligent lifeforms in the galaxy. In the story, these ...

SETI has new rules for verifying a possible alien signal. As artificial intelligence enters the search, another boundary deserves attention: finding unfamiliar information is not permission to turn it ...

Astronomers may have been listening for alien civilizations in only a small slice of the radio spectrum while overlooking a largely unexplored range of higher frequencies. Using archived data from the ...