Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

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 ...

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 ...

Advanced aliens could be chatting with each other using light flashes in plain sight, similar to how fireflies communicate, ...