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

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 ...

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 ...

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

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 ...

On August 15, 1977, the Big Ear Radio Telescope in Delaware, Ohio, received the most powerful signal it would ever detect during its decades of observations. The signal lasted just 72 seconds, but ...

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 ...

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