Left: an image of fossilized skin from a 55 million year old leatherback turtle (scale bar, 10 cm). Center: scales from an 85 million-year-old mosasaur (scale bar, 10 mm). Right: the tail fin from a 196 million-year-old ichthyosaur (scale bar, 5 cm). Image credit: Credit: Photographs by Bo Pagh Schultz, Johan Lindgren and Johan A. Gren.

January 14, 2014

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