A member of the Leiden Museum Naturalis unpacks and cleans the bones of a 66 million-year-old dinosaur species Triceratops in Leiden, The Netherlands, 09 December 2015. An expedition team of Naturalis excavated in the state of Wyoming a whopping five skeletons in September last year. This was the first time the bones were shown. (Photo by Remko De Waal/EPA)
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