76 million-year-old dinosaur fossil sells at auction for $6.1 million Thursday, July 28 by ABC News(NEW YORK) -- A skeleton of one of history's most ferocious predators sold at auction for just over $6 million to an unknown buyer on Thursday.Sotheby's had announced earlier this month that a fossilized Gorgosaurus, a relative of Tyrannosaurus rex, was set to be... Read More.