Duck-billed dinosaurs: Evolutionary bursts led to weird and wonderful head crests — ScienceDaily

The duck-billed hadrosaurs walked the Earth over 90-million years ago and were one of the most successful groups of dinosaurs. But why were these 2-3 ton giants so successful? A new study shows that their special adaptations in teeth and jaws and in their head crests were crucial, and provides new insights into how these innovations evolved.

Source: Duck-billed dinosaurs: Evolutionary bursts led to weird and wonderful head crests — ScienceDaily