Promising Signs of Life Detected on Distant Planet K2-18b
A research team from Cambridge University has reported new evidence suggesting the potential for life on planet K2-18b, located approximately 700 trillion miles away. Utilizing data from NASA's James Webb Space Telescope (JWST), scientists identified indicators of molecules typically associated with biological activity on Earth, specifically dimethyl sulphide and dimethyl disulphide. Lead researcher Prof. Nikku Madhusudhan stated this finding represents "the strongest evidence yet" of life beyond Earth, although he emphasized the need for more data to confirm these results.
Currently, the detection has achieved a three sigma level of confidence, equating to 99.7%, while a five sigma result is required for definitive claims. Experts maintain that while these initial findings are intriguing, they do not conclusively prove a biological origin, as alternative non-living processes could also produce such gases. Dr. Catherine Heymans, Astronomer Royal of Scotland, reiterated the complexity of interpreting these results, highlighting the ongoing scientific debate surrounding K2-18b's environment and composition.
The team's findings have been detailed in The Astrophysical Journal Letters.
