"Sam Neill plays Alan Grant, and Alan Grant is supposed to be... me." —Jack Horner(src) John "Jack" R. Horner is an American paleontologist who worked on the production staff for the Jurassic Park Series as a paleontology consultant. Horner is widely known for his discovery of Maiasaura, a dinosaur that backed up the idea that dinosaurs were parents. Horner is also famous because he led the team that discovered the soft tissue and proteins in dinosaur bones. He also leads a project to retro-evolve a chicken into a Chickenosaurus.