Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system, although they ...

While cautious about the findings, astronomers detected traces of a chemical that, on Earth, is produced by phytoplankton.

Astronomers say they've spotted a possible sign of life in the atmosphere of K2-18b, an exoplanet some 124 light-years away, using NASA's James Webb Space Telescope. As detailed in a new paper ...