Astronomers using the James Webb Space Telescope have detected potential biosignatures, specifically dimethyl sulfide (DMS) or dimethyl disulfide (DMDS), in the atmosphere of exoplanet K2-18b. These molecules are produced by microbial life on Earth, suggesting the possibility of past or present life on K2-18b, a potentially habitable Hycean world. However, scientists remain cautious, emphasizing the need for further observation and data analysis to confirm the presence of life. The findings, published in The Astrophysical Journal Letters, represent a significant step in the search for extraterrestrial life but require more evidence before definitive conclusions can be drawn.

Prepared by Olivia Bennett and reviewed by editorial team.