Scientists found fossils of animals that lived millions of years ago., Mud can preserve an animal’s footprints for a very long time., The dinosaur left a footprint in the soft ground., Over time, sand and sediment covered the dead animal., Some animals bury their food in the ground to eat later., A rabbit lives in a burrow under the ground., A paleontologist studies fossils to learn about life in the past., Dinosaurs roamed the Earth millions of years ago., Many prehistoric animals looked very different from animals today., Fossils give us evidence that certain animals lived on Earth long ago.

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