Dinosaurs were reptiles and most dinosaurs hatched from eggs. Amazingly blue whales are bigger than any dinosaur found so far. The largest dinosaurs were over 100 feet long and up to 50 feet tall. The smallest dinosaurs, were about the size of a chicken.
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No one knows exactly what noises dinosaurs made, what color they were or even when they lived. But scientist do have theories on these topics and you can find some of this information in this link.
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Most dinosaurs were plant-eaters (herbivores) about 65% of them. Some dinosaurs were meat-eaters (carnivores). Dinosaurs had many different distinguishing features that you can read more about when reading facts on each dinosaur.
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No one really knows exactly how many dinosaur species exist. The estimates vary from between 250 to over 1300 species.
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The term dinosaur (terrible lizard) was coined by the English anatomist Sir Richard Owen in 1842.
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No one knows how the dinosaurs became extinct or even if they are extinct, but there are many interesting theories on the topic and you can read more about them from this link page.
