"Dinosaur 13," a documentary film about the discovery and legal battle over the T. rex known as "Sue," is coming Aug. 15.

Via ComingSoon.net: On August 15, Lionsgate will release the documentary Dinosaur 13, based on the book "Rex Appeal: The Amazing Story of Sue, The Dinosaur That Changed Science, The Law and My Life" by Peter Larson and Kristin Donnan.

When paleontologist Peter Larson and his team from the Black Hills Institute made the world’s greatest dinosaur discovery in 1990, they knew it was the find of a lifetime: the largest, most complete Tyrannosaurus rex ever found. But during a ten-year battle with the U.S. government, powerful museums, Native American tribes and competing paleontologists, they found themselves not only fighting to keep their dinosaur but fighting for their freedom as well.

Dinosaur 13 will be available in select theaters, On Demand and on Digital HD August 15.

August 12, 1990:  Tyrannosaurus Rex Skeleton “Sue” Discovered

On this day in 1990, paleontologist Sue Hendrickson discovered the most complete (approximately 80%) and well-preserved Tyrannosaurus Rex fossil skeleton found to date.  The T-Rex, dubbed “Sue” after Sue Hendrickson, stands over 20 feet tall and 40 feet long on display at the Field Museum of Natural History in Chicago, IL.

What makes a Tyrannosaurus Rex so enormous in size?  NOVA scienceNOW has the answer.