In this Sunday, Oct. 15, 2017, photo, Tylor Birthisel, lab and field manager for paleontology at the Natural History Museum of Utah, reaches to control the plaster-encased skull of a Tyrannosaurus Rex found near Tropic, Utah. The nearly complete fossilized remains of a tyrannosaur found two years ago in southern Utah's Grand Staircase-Escalante National Monument were airlifted to the Natural History Museum of Utah on Sunday. Grand Staircase paleontologist Alan Titus discovered the fossils in the monument's Kaiparowits Formation. (Scott Sommerdorf/The Salt Lake Tribune via AP)