Anomaly Daily
Friday · September 11, 2026
Today's case
JWST Cycle 5: The Next Shot at K2-18b's Alleged Biosignature
Frontier Science2026-07-01
JWST Cycle 5 begins observations around July 2026, and among its targets: K2-18b, the sub-Neptune 124 light-years away where a 2023 Cambridge-led team claimed to detect dimethyl sulfide — a molecule produced by marine life on Earth. A 2025 NASA-led reanalysis (Welbanks et al., arXiv:2508.05961) found the evidence does not meet the scientific standard of detection. Cycle 5 data could settle it — or complicate it further. This is the scientific method running in public, in real time.
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