Sue is the nickname given to FMNH PR 2081, which is one of the largest, most extensive, and best preserved Tyrannosaurus rex specimens ever found, at over 90 percent recovered by bulk. It was discovered on August 12, 1990, by American explorer and fossil collector Sue Hendrickson, and was named after her. The fossil was auctioned in October 1997 for US$8.3 million, the highest amount ever paid for a dinosaur fossil. Sue is now a permanent feature at the Field Museum of Natural History in Chicago, Illinois.