This video breaks down why K2-18b has suddenly become one of the most important planets in the search for life beyond Earth.

Somewhere out there, a planet roughly the size of Earth may be orbiting a distant star in conditions that could support life. The problem is not finding the star.

The scientific search for extraterrestrial life is almost entirely focused on biosignatures, radio signals, and microbial ...

SETI scientists searched the interstellar object 3I/ATLAS for radio signals that could indicate extraterrestrial technology ...

A new exoplanet model screens rocky worlds by their ability to retain atmospheres over geologic timescales, helping narrow ...

Researchers have looked at how particular microbes from Earth would fare in conditions like those of Mars, the moon, and the ...

New research suggests sperm whales communicate in a complex language of their own. The implications for animal rights could ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

Astronomers suggest that space weather could distort alien signals, making them undetectable. This challenges traditional ...

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

“Do not shout ‘alien!’” Amid surge of public interest in UFOs or UAP, one group updated its rules for how news of extraterrestrials should be revealed.