tl;dr From the linked article: "The biosignature detected on K2-18 b is a molecule called dimethyl sulfide, a smelly substance that on Earth is produced only by

tl;dr From the linked article: "The biosignature detected on K2-18 b is a molecule called dimethyl sulfide, a smelly substance that on Earth is produced only by living organisms." From Ars, 3 days ago, a more cautious article: https://arstechnica.com/space/2024/01/no-the-james-webb-space-telescope-hasnt-found-life-out-there-at-least-not-yet/ https://arstechnica.com/space/2024/01/no-the-james-webb-spac...