The most consequential signal humanity ever detects from another civilization may not arrive as a calm introduction. It may appear as a brief, violent spike in the data a burst so unusual that it ...

These findings suggest that the absence of past detections does not mean discovery is imminent. If extraterrestrial ...

Humans have wondered for centuries whether we are alone in the universe — and a new study suggests that if alien ...

The first unmistakable sign of extraterrestrial technology may not arrive as a calm greeting. It may look more like a flare.

If advanced aliens lived on a planet within a few hundred to a thousand light years away from Earth, then vast numbers of their signals must already have crossed Earth without being noticed, a new ...

A recent SETI Institute study suggests that space weather could blur and weaken extraterrestrial radio signals long before they reach us.

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 ...

One of the longest-standing techniques in humanity’s search for life beyond Earth may be causing scientists to miss alien signals entirely, a new study finds. Since the very beginnings of the search ...

Scientists reveal one key way we might have missed signals from aliens - ‘Smearing’ of signals could mean that there are messages we are missing, researchers say ...