Recent findings from the James Webb Space Telescope suggest potential biosignatures of marine microorganisms on K2-18b, an exoplanet 124 light-years away. Researchers from the University of Cambridge detected dimethyl sulfide and dimethyl disulfide in its atmosphere, compounds linked to microbial life on Earth. While alternative chemical processes may explain their presence, the evidence is deemed strong for the possibility of life. K2-18b, which is classified as a potential Hycean planet, is situated in a habitable zone that could allow for liquid water, making it a prime candidate for further astrobiological exploration.
The scientists admit that there is a possibility that these substances have been produced on the planet by an unknown chemical process unrelated to microorganisms.
According to astrobiologists, discovering a Hycean planet would represent one of the best opportunities to find extraterrestrial life.
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