A 150 million-year-old dinosaur skeleton named Gnatalie is being displayed at the Natural History Museum’s new welcome center in Los Angeles. Gnatalie, a 75-foot-long green sauropod, is unique for its green bones, colored by the mineral celadonite during fossilization. This rare coloration occurred due to volcanic activity 50-80 million years ago. Discovered in 2007 in Utah’s Badlands, Gnatalie represents a new species from the late Jurassic Era. The exhibit will be open to the public in the fall of 2024.