A new study led by University of Chicago researchers has reanalyzed James Webb Space Telescope data and found weaker evidence for potential biosignatures on exoplanet K2-18b. Earlier reports had suggested the presence of dimethyl sulfide (DMS), a chemical associated with marine life on Earth. However, the latest analysis reveals that the signals are inconsistent and could be caused by other molecules such as ethane. The findings highlight the complexities of exoplanetary spectral analysis and call for rigorous standards in both scientific interpretation and media coverage of potential alien life discoveries.
