Scientists suggest the first alien signal we detect could be a desperate cry for help from a fading civilization.

The first unmistakable signal from another intelligence would rank alongside fire and writing in the story of our species, ...

Historically, many scientists and society have been fascinated by the prospect of making contact with extraterrestrial ...

SETI scientists observing a pulsar’s radio pulses over time are redefining how astronomers time pulsars and search for ...

1:33 Scientists investigating whether mysterious signal from a distant star could be alien life A group of Russian astronomers have detected a signal from a star system 94 light years away that has ...

On Dec. 18, just 24 hours before its closest approach, the Green Bank Telescope scanned frequencies from 1 to 12 GHz. Their ...

We can all relax: there will be no Independence Day-like invasion of Earth. There was much excitement — and skepticism — when it was revealed earlier this week that a mysterious signal had originated ...

In 1977, astronomers detected a powerful, narrowband radio signal that appeared to come from deep space. It lasted just 72 ...

Scientists searched 27 exoplanets for alien technology using planetary eclipses, revealing a new way SETI hunts signals ...

If Earth’s astronomical observatories were to pick up a signal from outer space, it would require an all-hands-on-deck effort to untangle and decipher the extraterrestrial message. An art project from ...

A group looking for alien communications among radio signals in space wants more help from home computers to crunch data. The Search for Extraterrestrial Intelligence at Home, known as SETI@home, ...