Dinosaurs in snow. Computer illustration of two Hypsilophodontid dinosaurs walking in snow. These small herbivorous dinosaurs, about the size of a turkey, lived in southern Australia around 100 million years ago (Cretaceous period). At this time Australia was extremely far south in latitude, and would have been cold and dark for much of the year. Studies of these dinosaurs have revealed that their skulls contain adaptations for seeing in low light. To cope with the cold, they are likely to have been warm-blooded.
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