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Giraffatitan brancai, a sauropod dinosaur that lived in the late Jurassic period. It was originally named as an African species of Brachiosaurus (B. brancai). Giraffatitan is one of the largest animals known to have walked the earth with its 22.5 meters (74 feet)... (KEYSTONE/STOCKTREK IMAGES/Rodolfo Nogueira)