Tuatara Reptile Slices Food With 'Steak-Knife Teeth'

New Zealand's tuatara has a unique way of chewing its food, say scientists who have studied its jaws in detail. This beak-headed reptile uses a "steak-knife sawing motion" as it chews. This could help explain how the species has continued to adapt to a changing world - and changes in available prey - over more than 200 million years. A computer model of the tuatara, recreating its jaws as it munched on prey, has revealed that it chews like no other land animal.