An illustration showing what exoplanet K2-18b could look like based on science data.

These molecules are only produced by microbial life such as marine phytoplankton here on Earth.

This is a revolutionary moment.

Scientists discover possible signs of life on K2-18b.

An illustration showing what exoplanet K2-18b could look like based on science data. (Photo: NASA, ESA, CSA, Joseph Olmsted, Public domain)

Im not sure were at the extraordinary evidence level yet, KreidbergtoldNPR.

I want to emphasize that this is an insanely difficult measurement.

Chemistry is pretty weird, and the galaxy is a very big petri dish.

Scientists discover possible signs of life on K2-18b.

Mixed phytoplankton. (Photo: NASA, University of Rhode Island/Stephanie Anderson, Public domain)

The studys researchers have been exercising restraint as well, managing their enthusiasm with the necessity of more evidence.

ForNPR, Holmberg added: We should be cautious.

For those eager to learn more about this groundbreaking research, the full study can beread inAstrophysics Journal Letters.

Scientists discover possible signs of life on K2-18b.

An artist’s rendition of what a Hycean planet may look like. (Photo: Pablo Carlos Budassi, viaWikimedia Commons,CC 4.0)

An artist’s rendition of what a Hycean planet may look like.