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Were dinosaurs reptiles?

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Are dinosaurs reptiles - an easy to understand look at dinosaur classification & evolution for kids & students. Learn how reptiles became dinosaurs & birds. read more

Although dinosaurs didn’t display all of the characteristics of modern reptiles (i.e. being cold-blooded), they were still considered to be reptiles. Are Dinosaurs Reptiles: A Modern Approach Much of what we know about dinosaurs is pieced together from fossils. read more

The hot question of whether dinosaurs were warm-blooded like birds and mammals or cold blooded like reptiles, fish and amphibians finally has a good answer. Dinosaurs, for eons Earth's dominant land animals until being wiped out by an asteroid 65 million years ago, were in fact somewhere in between. read more

Other groups of reptiles split off over the next 120 million years, and one branch called the dinosaurs were very successful. These dinosaurs were only distantly related to modern snakes, lizards, and turtles, groups that had split off at different times. read more

These dinosaurs were only distantly related to modern snakes, lizards, and turtles, groups that had split off at different times. But 65 million years ago there was a massive extinction event, and all dinosaurs were killed except for a single group of feathered dinosaurs. read more

Still, the idea that non-avian dinosaurs were uniformly gigantic is a misconception based in part on preservation bias, as large, sturdy bones are more likely to last until they are fossilized. Many dinosaurs were quite small: Xixianykus, for example, was only about 50 cm (20 in) long. read more

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