<ul><li>TOI-421 b, a hot sub-Neptune located 244 light-years away, surprises scientists with a clear atmosphere rich in water vapor, sulfur dioxide, and hydrogen.</li><li>James Webb Telescope's discovery challenges existing models of sub-Neptune formation as TOI-421 b's hydrogen-dominated atmosphere resembles gas giants like Jupiter.</li><li>TOI-421 b's unique chemistry offers valuable insights for scientists and suggests hotter sub-Neptunes could be important targets for future observations.</li><li>This discovery highlights the vast diversity of exoplanets and raises important questions about planetary formation and the potential for alien life, showcasing the power of Webb's capabilities.</li></ul>

A Cosmic Breakthrough: James Webb Telescope Peers into the Heart of a Strange Exoplanet

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