First Spectrum: Strongest biosignature signal yet found on exoplanet

London, UK (SPX) Apr 10, 2025
Astronomers have reported their most compelling evidence to date of potential biological activity on a planet beyond our solar system, though they emphasize further verification is needed. Using the James Webb Space Telescope (JWST), a research team led by the University of Cambridge identified the spectral presence of dimethyl sulfide (DMS) and/or dimethyl disulfide (DMDS) in the atmosphere of exoplanet K2-18b.