Astronomers have detected potential signs of extraterrestrial life on exoplanet K2-18b, located 120 light-years from Earth. Utilizing data from NASA's James Webb Space Telescope, researchers identified dimethyl sulfide (DMS) and dimethyl disulfide (DMDS) in the planet's atmosphere—gases typically associated with biological activity on Earth.

The discovery, announced on April 16, 2025, marks a significant milestone in the search for life beyond our planet. While the detection reached a 99.7% confidence level, scientists caution that further verification is necessary. Dr. Nikku Madhusudhan, leading the study at the University of Cambridge, emphasized the need for additional observations to confirm the presence of these compounds. 

K2-18b is classified as a Hycean planet—characterized by a hydrogen-rich atmosphere and a potential global ocean beneath. Previous studies have shown the presence of water vapor in its atmosphere, and the current findings suggest that the planet may harbor conditions conducive to life. 

This revelation has sparked widespread interest and debate within the scientific community. While some experts view the findings as promising, others urge caution, noting that non-biological processes could also produce the detected gases. Nonetheless, the detection of potential biosignatures on K2-18b represents a groundbreaking step in exoplanet research and the ongoing quest to understand the potential for life elsewhere in the universe.