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

The history of astronomical discovery shows that many of the most detectable phenomena, especially detection firsts, are not ...

A new study explores whether extraterrestrial signals could have already reached Earth undetected, examining what that would imply for current searches. Credit: Shutterstock. Dete ...

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 ...

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

Image: Conceptual illustration of a possible signal from an alien civilization reaching Earth.Detecting such signals — or ...

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

Aliens may have been trying to contact humans for years, suggests new research. But stellar “space weather” could mean radio signals from friendly extraterrestrial intelligence get lost in space, say ...

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 ...

We may have been missing signals from intelligent aliens because of solar wind. Researchers from the Search for Extraterrestrial Intelligence (SETI) Institute say this means we have been watching for ...