Sophie the Stegosaurus

Sophie, Stegosaurus stenops, at the Natural History Museum in London in December 2014, the month she went on permanent display. Most of what you see is real fossil bone, though the head on show is a replica, and she is the most complete Stegosaurus skeleton known, found in Wyoming in 2003. She is smaller than many visitors expect: 5.6 meters long and 2.9 meters tall, about 18 feet by 9.5 feet. Scientists working from a digital model of her bones put her living weight at around 1,600 kilograms, close to a small rhino.