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Certain beetles are known to pollinate plants. New fossil evidence from Mexican and Dominican fossilized amber indicates that they were doing so 20 million years ago (Miocene epoch), according to Oregon State University scientist George Poinar, Jr.
According to The Petrified Wood Museum, a common fossil mold includes insect wing impressions. By studying the preserved pleating on the wings, paleontologists identify the insect family. Display. Museums make plaster of Paris or fiberglass casts of fossils to preserve the original fossil for study. Paleontologists also use casts for study if the original fossil is too fragile. When the weight of the fossil makes mounting of the original impractical, copies are used for display purposes.