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

The search for aliens has led astronomers to scour the farthest reaches of the cosmos for signs of life. But a new study suggests that we might not need to look so far from home. According to NASA ...

Imagine if the nearest intelligent aliens were not across the street, not across the solar system, but on the far side of the Milky Way, some 33,000 light-years away from Earth. That’s the scenario ...

This illustration shows what exoplanet K2-18b could look like based on science data. (Illustration: NASA, ESA, CSA, Joseph Olmsted (STScI)) A team of researchers published a study on April 17 that ...

LONDON (AP) - Astronomers have found possible chemical signs of life on a distant planet outside our solar system, though they caution more work is needed to confirm their findings. The research, led ...

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 ...