Starting today (May 26), the Field Museum in Chicago is celebrating the tenth anniversary of its having on exhibit the largest and most complete known skeleton of Tyrannosaurus rex.
Named after Sue, Hendrickson, the paleontologist who discovered it, the skeleton caused a certain amount of controversy and legal wrangling, after it was discovered on private land in North Dakota and put up for auction. Eventually, it was purchased by the Field Museum for a record $7.6 million at a Sotheby auction in 1997.
Paleontologists estimate that Sue was 28 years old at death, making it the oldest known T. rex. In addition, it is approximately 80 percent complete, making it the most complete known T. rex as well.
For more information about Sue and the Field’s celebration, see the museum’s website at http://www.fieldmuseum.org/sue/#index.