A new study challenges the dream of water-rich “Hycean” planets like K2-18b, suggesting that most sub-Neptunes lose their water deep into their interiors during formation. Instead of vast oceans, ...
Scientists using the James Webb Space Telescope (JWST) have spotted unusual gases in the air of a planet called K2-18b, which is 124 light-years away. These gases, on Earth, come mostly from living ...
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