Webb Probably Didn’t Detect Biosignature Gas on K2-18b

Based on computer models that account for the physics and chemistry of DMS, as well as the hydrogen-based atmosphere, the researchers found that it is unlikely the data show the presence of DMS.

https://www.sci.news/astronomy/webb-biosignature-gas-k2-18b-12904.html#:~:text=In%202023%2C%20astronomers%20reported%20a,%2DEarth%20exoplanet%20K2%2D18b.