This year, one tail vertebra from a long-necked dinosaur was auctioned off for more than $8,000. A single spike from a Stegosaurus’s tail sold for more than $20,000. A Tyrannosaurus rex tooth? More than $100,000.
In a booming market for dinosaur fossils, Sotheby’s estimated that a T. rex skull it was auctioning would fetch between $15 million and $20 million. But at its sale on Friday, the specimen was sold for $6.1 million, including…