Among the thousands of exoplanets now catalogued, sub-Neptunes — worlds caught between Earth and Neptune in size — have long resisted our understanding of what they truly are. A team at Arizona State University has discovered that the clouds shrouding these planets are not passive veils but active forces, trapping heat so intensely that they may melt the rocky interiors beneath into oceans of magma. This finding, drawn from James Webb Space Telescope data and detailed modeling, suggests that what we observe in a distant planet's atmosphere may be a distorted reflection of a far more turbulent