Assistant Curator of Vertebrate Paleontology and lead dinosaur paleontologist at Carnegie Museum of Natural History.
T. rex vs. T. rex, Carnegie Museum of Natural History Dinosaurs i...
Glass cube behind Phipps Conservatory, Pittsburgh, Pennsylvania
Baichengzi locality, Yujingzi Basin, Gansu Province, China
"Striking a pose" at Changma Basin Quarry 3
Quarry 3, Changma Basin, northwestern Gansu Province, China, June...
Liujiaxia Dinosaur Geopark, Gansu Province, China
Fossil-rich block from Ghost Ranch, New Mexico
Reconstructed skeleton of Spinosaurus during installation, Dinosa...
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