Discover how scientists reconstruct dinosaurs using fossil bones, footprints, skin impressions, feathers, and modern technology. Explore what paleontologists know about prehistoric animals—and which mysteries remain unsolved.

How many teeth did a T. rex have? Discover how approximately 60 powerful, serrated teeth helped one of history's most famous predators bite, tear, and even crush bone—and learn how paleontologists use fossil clues to uncover the secrets of T. rex.