On the last day of an expedition to fossil fields in the Hell Creek Formation in South Dakota this summer, fossil hunter Anthony Maltese discovered the partial remains of a juvenile Tyrannosaurus rex, scattered under soft mud in an area his team had been excavating, on and off, for the last 30 years. The team recovered 55 bones from different parts of the animal’s body and transported them back to the Rocky Mountain Dinosaur Resource Center in Woodland Park, Colo., where they are being cleaned and preserved. (Video by Skyler Ballard)