these beasts are big, no wonder it took them that long to unearth it without damaging.
The hadrosaurs are known as the duck-billed dinosaurs due to the similarity of their head to that of modern ducks.
The whole front of the skull was flat and broadened out to form a beak, which was ideal for clipping leaves and twigs from the forests of Asia, Europe and North America.
However, the back of the mouth contained thousands of teeth suitable for grinding food before it was swallowed.
Hadrosaurs likely grazed on horsetails and vegetation close to the ground, rather than browsing higher-growing leaves and twigs.