Why did prehistoric animals become extinct?
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One such event was the impact that formed the Gulf of Mexico. Some scientists believe this event led to the extinction of the dinosaurs.
Fossils used to be found accidentally by people working in mines or quarries. Sometimes they became exposed by erosion, and could be seen sticking out of cliff faces. Geologists are now able to identify those rock formations likely to contain fossils. More and more fossils are being found by properly organized expeditions.
Large numbers of new types of fossil are now being found in Mongolia and China. There, fossil hunters have unearthed what are probably the ancestors of modern birds.
Fossils provide us with fascinating information about prehistoric life.
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Date Added: 12 December '11
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