Photo credit: Mail Online

NASA’s New Horizon spacecraft has spotted an anomaly on Pluto’s surface, and while it may look like a snail, the research team claims it’s just a dirty block of water ice. That’s right, they say it’s floating in denser solid nitrogen, which has been dragged to the edge of a convection cell. The images you see above, captured at the very center of Sputnik Planum, an icy plain that forms the left side of Pluto’s ‘heart’ feature, were transmitted to Earth on Dec. 24. Continue reading for more up-close images and another video.