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'Snakeskin' terrain on Pluto In this extended color image of Pluto taken by NASA's New Horizons spacecraft, rounded and bizarrely textured mountains, informally named the Tartarus Dorsa, rise up along Pluto's day-night terminator and show intricate but puzzling patterns of blue-gray ridges and reddish material in between. This view, roughly 530 kilometers across, combines blue, red and infrared images taken by the Ralph/Multispectral Visual Imaging Camera (MVIC) on July 14, 2015. It shows a region to the east of Tombaugh regio where low hills are covered with blade-like surface features. NASA / JHUAPL / SwRI