A fossil is what is left of a plant or animal that lived long ago. Shells, bones, trees, and plants can all be fossils. 
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Some fossils are actual parts of plants or animals that have turned into stone. |
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Sometimes a fossil will be a stone with just the shape of a plant or animal left in it, but without the actual parts of the plant or animal in the stone. |
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Amber is also a type of fossil. Amber is sap from a tree that has hardened with a plant or animal inside of it. Amber is hard and looks like yellow glass. |
