The Search for Extraterrestrial Intelligence (SETI) focuses on finding technosignatures—potential signs of alien technology. If we look carefully, we might have a chance at detecting their ...

A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But not everyone agrees that it signals life. An illustration shows what ...

Humans should look to planetary alignments outside of the solar system when searching for signatures of extraterrestrial communications, scientists say. The nascent search for radio transmissions from ...

If there's one modern astronomical concept that has successfully permeated the mainstream media, it's the "Goldilocks zone." Not only is it associated with the search for alien life, one of the more ...

An ocean world that's teeming with microbes — and who knows what other kinds of life — is currently the best explanation for some chemical signatures that the James Webb Space Telescope has spotted in ...

NASA has taken a bold step in the search for alien life beyond Earth. The space agency announced the selection of seven advanced technology partners for its next major mission, the Habitable Worlds ...