Famed paleontologist Jack Horner was used during production to ensure the dinosaurs exhibited scientifically accurate behavior, and Robert T. Bakker—also a paleontologist—gave animators information about the dinosaur's physical characteristics. In the forward of his 1995 novel Raptor Red, Bakker had nothing but praise for the animators creating the dinos. "The artists ... wanted the latest info on all the species they were reconstructing. They wanted everything to be right. They'd been calling me once a week for months, checking on teeth of T. rex and skin of Triceratops. I'd sent them dozens of pages of dino-details." He told Popular Mechanics in 2012 that the dinosaur artists working on Jurassic Park were "better animal morphologists than most tenured professors."