The skeleton of a Stegosaurus, named "Apex," has officially taken the title of the most expensive fossil ever sold, with a confirmed final bid price of $44.6 million, according to Sotheby's ...

Unveiled at the American Museum of Natural History, 'Apex', a rare 150-million-year-old Stegosaurus fossil, is now on display. The fossil, considered the most complete Stegosaurus skeleton ever ...