 That's Grateful Dead drummer Mickey Hart. He and the rest of the recipients will be honored in Washington, D.C. on December 8th. Isabella Gomez-Sarmiento, NPR News. Sotheby's has auctioned off a skeleton of a stegosaurus for more than $44 million, the most ever paid for a fossil. According to the auction house, the dinosaur, nicknamed Apex, was expected to bring in between $4 and $6 million. The stegosaurus lived during the late Jurassic period.