For decades, scientists have searched the skies for signs of extraterrestrial technology. A study from EPFL asks a sharp question: if alien signals have already reached Earth without us noticing, what ...

Astronomers have searched the skies for signs of extraterrestrial technology for decades. These searchers since 1960 have ...

The first unmistakable signal from another intelligence may not be a cheerful greeting. A growing group of researchers is arguing that our inaugural contact is more likely to be a distress call, the ...

Green Bank Telescope rules out alien signals in interstellar comet 3I/ATLAS after rigorous scientific deep search.

Since the first Search for Extraterrestrial Intelligence (SETI) experiment in 1960, scientists have been scanning the Milky Way for signs of advanced alien civilizations. They have looked for unusual ...

A mysterious radio signal has been traced to a galaxy far, far away. And, it's causing a stir among astronomers -- although nobody is sure what it is. Research published this week in the journal ...

If it were a phone call, we might call it a butt dial: A strong radio signal that set off questions about whether it emanated from an advanced alien race earlier this week is now believed to have come ...