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(Scott Sommerdorf | The Salt Lake Tribune) Tylor Birthisel, lab & field manager for paleontology at the Natural History... (Scott Sommerdorf | The Salt Lake Tribune) Tylor Birthisel, lab & field manager for paleontology at the Natural History... (Scott Sommerdorf | The Salt Lake Tribune) BLM Paleontologist Alan Titus, center, speaks with Taylor Birthisel, left as... (Scott Sommerdorf | The Salt Lake Tribune) BLM Paleontologist Alan Titus smiles as he plays Jeanette Bonnell's mandolin... (Scott Sommerdorf | The Salt Lake Tribune) One of the plaster-encased bundles of fossilized Tyrannosaurus Rex skeleton ... (Scott Sommerdorf | The Salt Lake Tribune) Tylor Birthisel, left, and Alan Titus, right work to unload one of the plast... (Scott Sommerdorf | The Salt Lake Tribune) BLM paleontologist Alan Titus, left, and volunteer paleontologist Jeanette B... (Scott Sommerdorf | The Salt Lake Tribune) Tylor Birthisel, left, Alan Titus, center, and Jeanette Bonnell, right right... (Scott Sommerdorf | The Salt Lake Tribune) BLM paleontologist Alan Titus, left, and volunteer paleontologist Jeanette B... (Scott Sommerdorf | The Salt Lake Tribune) Paleontologists Alan Titus, left and Tylor Birthisel, center, laugh as they ... (Scott Sommerdorf | The Salt Lake Tribune) Paleontologist Alan Titus, left, listens as Taylor Birthisel, talks about th... (Scott Sommerdorf | The Salt Lake Tribune) Paleontologist Taylor Birthisel, left, and Jeanette Bonnell work to unhook t... (Scott Sommerdorf | The Salt Lake Tribune) Paleontologists Alan Titus, left and Tylor Birthisel, as the helicopter carr... (Scott Sommerdorf | The Salt Lake Tribune) Paleontologist Tylor Birthisel, loses his hat as the helicopter carrying one... (Scott Sommerdorf | The Salt Lake Tribune) A fossil of a conifer from the early cretaceous period can be seen in the ce... (Scott Sommerdorf | The Salt Lake Tribune) Paleontologist Alan Titus points out a fossil of a plant from the early cre... (Scott Sommerdorf | The Salt Lake Tribune) A group including Jeanette Bonnell, left, Tylor Birthisel, center, and Alan ... (Scott Sommerdorf | The Salt Lake Tribune) Paleontologist Alan Titus makes a photo of one of the bundles of a fossilize... (Scott Sommerdorf | The Salt Lake Tribune) Paleontologist Alan Titus pats the plaster casing as he spends some personal... (Scott Sommerdorf | The Salt Lake Tribune) The dirt road that led to the area near Tropic, Utah, where a nearly complet... Paleontologist Randall Irmis, the curator of paleontology at the Natural History Museum of Utah, gathers tools next to fossil... A cracked fossil from a tyrannosaur skeleton reveals the fossilized marrow inside at the site of a paleontological expedition... A paleontologist and field volunteers from the Natural History Museum of Utah encase a fossil in a plaster jacket while on an... Paleontologist Randall Irmis, the curator of paleontology at the Natural History Museum of Utah, extricates a fossilized rib ... Toe bones, the upper jaw, and snout of the fossilized remains of a tyrannosaur skeleton found in Grand Staircase-Escalante Na... Randall Irmis, right, a paleontologist and curator of paleontology at the Natural History Museum of Utah, and Benn Breeden, a...