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Scientists Detect Strongest Evidence Yet of Potential Life on Exoplanet K2-18 b

  • A Cambridge team reported hints of dimethyl sulfide on exoplanet K2-18b using the JWST.
  • Previous work suggested DMS could be a biosignature, prompting the team to analyze K2-18b's atmosphere.
  • The team used JWST to observe light passing through K2-18b's atmosphere, searching for molecular signatures.
  • The team found a signal with a three-sigma statistical significance, suggesting only a 0.3% chance of error.
  • Despite the exciting find, the authors and other experts urge caution, pending further validation and data.
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Scientists find signature of life on a distant planet, study suggests

A team of astronomers has detected what they call the most promising signs to date of a possible biosignature, or signs of past or present life linked to biological activity, on an exoplanet named K2-18b.

·Florida, United States
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npr broke the news in Washington, United States on Wednesday, April 16, 2025.
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