Jack Horner is a renowned American paleontologist known for his significant contributions to the study of dinosaurs. He gained fame for his discoveries in the Montana region, where he unearthed important dinosaur fossils, including those of the Tyrannosaurus rex and the Maiasaura. His work has helped shape our understanding of dinosaur behavior and development. In addition to his fieldwork, Horner has been involved in various educational and outreach efforts, aiming to inspire interest in paleontology. He has also served as a consultant for several films, including the popular Jurassic Park series, where his expertise influenced the portrayal of dinosaurs on screen.