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Sometimes scientists find fossils of sea creatures, such as the trilobite, high in the mountains. Could the land where it was found once have been under the ocean?
Millions of years ago, some insects got trapped in gooey tree sap that hardened into a kind of fossil called amber. The amber preserves the bugs exactly as they were when they were alive.
Dinosaur fossils are the largest fossils ever discovered. Scientists hardly ever find a complete dinosaur skeleton. Fossilized dinosaur eggs have been found all over the world. Footprints can tell us a lot about dinosaurs—how big they were, how fast or slowly they moved, where they roamed, and whether they traveled alone or in herds.
Scientists never find dinosaur skin (it rotted away long ago), but fossil imprints can show what dinosaur skin was like.
hope that helps a little