Pteranodons didn't have teeth. elaborate
Coelophysis, a dinosaur from the Triassic period, had surprisingly hollow bones, making it lightweight and agile. elaborate
Triceratops's frill wasn't just for show; it likely had large holes in it to reduce weight. elaborate
Giganotosaurus was bigger than Tyrannosaurus Rex. elaborate
Heterodontosaurus had different shaped teeth – some like incisors for cropping plants, others like canines for defense, and molars for grinding. This diverse dentition is unique among early ornithischians. elaborate
Acrocanthosaurus had spines along its back that were much taller than those of most other theropods, possibly supporting a hump or sail. elaborate