Starting Aug. 12, the public can watch fossil preparation of the r Tyrannosaurus rex skull “live.” Over the next several months, Burke paleontologists will carefully remove the rock surrounding the skull, slowly exposing the 66-million-year-old specimen. in summer 2016 in the Hell Creek Formation in northeast Montana, the skull is 4 feet long, weighs 3,000 pounds in its field jacket, is the first in Washington and one of only 15 reasonably complete T. rex skulls ever discovered. Read more from the .