Possible Biosignature Hints on Exoplanet K2-18b From JWST, with Caution on Non-Biological Origins

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Scientists led by Nikku Madhusudhan using JWST report the strongest hint yet of a biosignature outside Earth in the atmosphere of the Hycean exoplanet K2-18b, detecting dimethyl sulfide and/or dimethyl disulfide that could indicate microbial activity though non-biological processes might account for the signal, so more observations are needed.

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Strongest hints yet of biological activity outside the solar system
cam.ac.uk

Strongest hints yet of biological activity outside the solar system

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