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LONDON (AFP) - A duck-billed dinosaur which was a favourite prey of the Tyrannosaurus Rex grew "like crazy" from egg to adult-size to avoid being eaten by the king of the dino world, a study revealed Wednesday.
The Hypacrosaurus grew three to five times faster than any of its predators including the T-Rex -- and also had babies at a much younger age, expanding its numbers to give it an evolutionary edge.
"By the time the duck-billed dinosaur was fully grown, the tyrannosaurs were only half grown -- it was a huge size difference," said US researcher Drew Lee in an online journal, calling it the "gazelle of the Late Cretaceous."
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The Hypacrosaurus grew three to five times faster than any of its predators including the T-Rex -- and also had babies at a much younger age, expanding its numbers to give it an evolutionary edge.
"By the time the duck-billed dinosaur was fully grown, the tyrannosaurs were only half grown -- it was a huge size difference," said US researcher Drew Lee in an online journal, calling it the "gazelle of the Late Cretaceous."
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