World 's most complete stegosaurus skeleton unveiled at Natural History Museum . Skeleton is 5.6 m long and made up of more than 300 bones , 19 plates and 4 spikes . Found at Red Rock Ranch in Wyoming , USA , in 2003 , moved to China in 2013 . Stegosaurus inhabited the world 156 to 144 million years ago , in late Jurassic period .
World 's most complete stegosaurus skeleton unveiled at Natural History Museum . Skeleton is 5.6m long and made up of more than 300 bones , 19 plates and four spikes . Found at Red Canyon Ranch in Wyoming , USA , in 2003 , donated to museum in 2013 . Stegosaurus roamed the Earth 156 to 144 million years ago , in late Jurassic period .