Did JWST just hear life on K2-18b? In 150 seconds we cut through the hype: what JWST measured, why dimethyl sulfide (DMS) mattered, and why follow-up analyses now cast doubt on any conclusive biosignature. Learn the basics of Hycean worlds, how spectral detections work, and why the scientific standard (5-sigma) hasn't been met. This rapid explainer balances the excitement with sober updates from NASA reanalyses and independent teams finding possible red noise and instrumental limits. If you foun
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