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Fossils are the traces of ancient animals and plants found buried in rock. Sometimes a fossil retains the shape and structure of the hard parts of an animal, such as fossilized dinosaur bones. These are not the original bones, because minerals have replaced them over millions of years, but they have the same shape.
Other fossils are just the impression of an animal or plant, created when the plant or animal was buried in mud that has gradually solidified into rock.
Even footprints of ani
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Tags: animals,
ancient
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