[Las Vegas, September 30. Image via Getty]

LAS VEGAS - SEPTEMBER 30: Enya Kim from the Natural History department at auctioneers Bonhams & Butterfields stands inside one of the world's largest set of shark jaws comprised of about 180 fossil teeth from the prehistoric species, Carcharocles megalodon, which grew to the size of a school bus, at the Venetian Resort Hotel Casino September 30, 2009 in Las Vegas, Nevada. Bonhams & Butterfields hope the fossil will fetch about USD 900,000-1.2 million when it is auctioned off on October 3 at the Venetian as part of their Natural History auction. The centerpiece of the lot of 50 fossils being auctioned is a 66-million-year-old Tyrannosaurus rex skeleton dubbed 'Samson.' The 40-foot-long female dinosaur fossil, excavated in South Dakota in, contains about 170 bones and is said to be the third most complete T. rex skeleton ever unearthed. Bonhams & Butterfields is hoping Samson will fetch more than USD 6 million at the auction. (Photo by Ethan Miller/Getty Images)