Frigid Pluto, home to some of our solar system's chilliest real estate, may well harbor an ocean beneath its miles-thick ice shell, new research suggests. Despite its extreme cold, the dwarf planet still appears to be warm enough to "easily" have a subsurface ocean, according to a new model of the rate at which radioactive heat might still warm Pluto's core. And that ocean wouldn't be a mere puddle, noted planetary scientist Guillaume Robuchon of the University of California, Santa Cruz. (source: news.nationalgeographic.com)
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