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 ...

The most consequential signal humanity ever detects from another civilization may not arrive as a calm introduction. It may ...

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

Add Yahoo as a preferred source to see more of our stories on Google. Turbulent star environments may broaden alien radio signals, making them harder for SETI to detect. (CREDIT: Shutterstock) Radio ...

The search for extraterrestrial intelligence (SETI) has yet to detect alien technosignatures like radio waves, but the cosmos is vast, and there are plenty of places left to look. New research ...

Aliens: "Sorry, you're cutting out!" The post Something May Be Scrambling Alien Messages, NASA-Funded Research Finds appeared ...

People have been looking up at the Milky Way for thousands of years, marveling at its vastness. It was only a matter of time before they began to wonder if life similar to ours could exist on the ...

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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 ...