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Doubt Cast on Claim of 'Hints' of Life on Faraway Planet

  • Astronomers led by Cambridge University announced in April they detected potential biosignatures on exoplanet K2-18b, located 124 light-years away in the Leo constellation.
  • The announcement followed analysis of James Webb Space Telescope data, claiming detection of dimethyl sulfide and dimethyl disulfide, chemicals linked to life on Earth, though several recent studies dispute these conclusions.
  • Subsequent re-analyses expanded possible molecules explaining the signals to over 90, with no strong statistical evidence for the initial biosignatures, and experts emphasized the need for more observations.
  • Madhusudhan from Cambridge noted a three in 1,000 chance the detection is a fluke and stressed that openness to all possibilities remains essential to the scientific method.
  • The findings so far do not confirm extraterrestrial life but demonstrate advances in exoplanet studies, indicating further data will clarify K2-18b's atmospheric composition and habitability potential.
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Doubt cast on claim of 'hints' of life on faraway planet

When astronomers announced last month they might have discovered the most promising hints of alien life yet on a distant planet, the rare good news raised hopes humanity could soon learn we are not alone in the universe.

·Missoula, United States
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  • 42% of the sources are Center, 42% of the sources lean Right
42% Right
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Phys.org broke the news in United Kingdom on Friday, May 23, 2025.
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