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Life and Giant Planets
Europa bulge


This mitten-shaped region of Europa seems to bulge upward from the icy crust around it. Such regions may form by solid-state convection, where heating causes the terrain to move differently. Other possibilities include ice volcanism or melting caused by the subsurface ocean. As liquid moves upward into the crust, it has the potential to bring organics closer to the surface. Credit: NASA/JPL/University of Arizona

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