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This book explores the lives of these gigantic creatures, exploring their diet, physical characteristics, and how they could defend themselves against predators.The first dinosaurs were small meat-eaters, or carnivores, that snapped up bugs and other small creatures. Then some dinosaurs started eating plants. They were herbivores. Over millions of years, bigger and bigger dinosaurs evolved. The plant-eaters, or herbivores, were the biggest by far. Some of them were really awesome giants more than 30 metres (100 ft) long, and standing taller than a house. They were the biggest creatures that have ever lived on land.
