A unique fossil of the duck-billed dinosaur Edmontosaurus regalis shows for the first time that those dinosaurs’ heads were adorned with a fleshy comb, similar to that of a rooster. Edmontosaurus regalis. Image credit: Julius Csotonyi / Current Biology. The duck-billed dinosaurs, or the hadrosaurs, lived in what is now North America between 75 and 65 million years ago. They were giant plant-eaters – about 12 m long – and filled a similar...
