Susan "Sue" Hendrickson (born December 2, 1949) is an American paleontologist. Hendrickson is best known for her discovery of the remains of a Tyrannosaurus rex in South Dakota on August 12, 1990. Her discovery was the largest specimen of a T. rex found and one of the most complete skeletons. This skeleton is now known as "Sue" in honor of her discovery. It is on display at the Field Museum in Chicago, Illinois. She has also found other important fossils and artifacts around the world.