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A fossil dinosaur originally discovered in northwestern China is so exquisitely preserved that the shape of its cloaca the opening used for excretion and mating is visible for the first time. The evidence has actually been in plain sight. The psittacosaurus a kind of early ceratopsian related to Triceratops that lived around 120 million years ago has been on public display at the Senckenberg Museum of Natural History in Frankfurt, Germany, for over a decade and several scientific papers have already been written about its primitive feathers and coloring.