Jack Horner, the Museum's Curator of Paleontology, is known for his groundbreaking discoveries of the first dinosaur eggs in the Western Hemisphere, the first evidence of dinosaur colonial nesting, the first evidence of parental care among dinosaurs, and the first dinosaur embryos.
He is widely regarded as one of the world's foremost paleontologists, noted for his fieldwork and some of the best reconstructions of fossil dinosaurs ever assembled. Horner is a recipient of the MacArthur Fellowship "genius grant". He served as the technical adviser for all three of the Jurassic Park movies and is the inspiration for the movie's lead character, Dr Alan Grant. The Museum of the Rockies, as the result of Horner's continuing fieldwork, has the largest Tyrannosaurus rex collection in the world.