There's a new scene-stealing dinosaur in town at the American Museum of Natural History, which announced today the arrival of Apex, a 150 million-year-old Stegosaurus fossil that's set to go on display in the lobby of the Richard H. Gilder Center for Science Education this weekend. We got a sneak peek at this new giant, who joins the already impressive ranks at one of our favorite museums for kids in NYC just in time for Christmas vacation visits!