Duck-billed dinosaurs outgrew predators to survive

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Hypocrasaurus grew three to five times faster than predators such as tyrannosaurs. Art by: Drew LeeOhio University
Hypocrasaurus grew three to five times faster than predators such as tyrannosaurs. Art by: Drew Lee/Ohio University
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With long limbs and a soft body, the duck-billed hadrosaur had few defenses against predators such as tyrannosaurs. But new research on the bones of this plant-eating dinosaur suggests that it had at least one advantage: It grew to adulthood much faster than its predators, giving it superiority in size.


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