Strongest Evidence of Life on Alien Planet Found: Signs of Biological Compounds Detected on K2-18 b

 ​Scientists using the James Webb Space Telescope have detected potential signs of life on exoplanet K2-18 b, located 124 light-years away in the constellation Leo. The telescope identified chemical signatures of dimethyl sulfide (DMS) and dimethyl disulfide (DMDS) in the planet's atmosphere—compounds on Earth primarily produced by marine microorganisms. This discovery suggests the possibility of biological activity beyond our solar system.​

K2-18 b is classified as a "hycean world," a type of exoplanet theorized to have a hydrogen-rich atmosphere and a vast ocean, conditions potentially conducive to microbial life. The presence of DMS and DMDS was detected with a 99.7% confidence level, indicating a strong signal. However, scientists caution that these findings are not definitive proof of life. Further observations and studies are necessary to rule out non-biological processes that could produce these compounds. The research marks a significant advancement in the search for extraterrestrial life, highlighting the capabilities of current astronomical instruments to detect potential biosignatures on distant planets.​