Space is full of electromagnetic radiation like radio signals, but those signals are usually coming from stars or black holes, not planets.

Humans have been searching the stars for alien radio signals for decades — and so far, E.T. has not phoned home. But that doesn’t mean intelligent life isn’t out there, a new study hints. Rather, ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration of an exoplanet in an alien star system. New research suggests that radio emissions from intelligent aliens may be ...

Could the interstellar object 3I/ATLAS exhibit technosignatures, or signals of alien technology? This is what a recent study published in The Astronomical Journal hopes to address as a team of ...

Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

SETI has new rules for verifying a possible alien signal. As artificial intelligence enters the search, another boundary ...

The discovery could help astronomers determine whether an outer world is suitable for life.

We’ve been wondering if we are all alone in the universe for thousands of years. It hasn’t been until recently that we began a determined search of the heavens to see if extraterrestrial life is ...

"Natural astrophysical processes rarely generate extremely narrow spectral features while engineered transmitters often do," writes a team of astronomers including first author Zi ...

In 1977, radio astronomers at Ohio State University’s Big Ear telescope in western Ohio picked up a remarkably intense radio signal from deep space. It came from something exceptionally bright and ...