Timothy's Awesome Bio Project on Sharks
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When did Sharks first appear on the planet Earth?

According to fossil evidence scientists have found that some types of sharks may have appeared on Earth close to 410 million years ago. The period of time is know as the Devonian period. During the Devonian period the majority of living things lived in the water, hence sharks are the oldest organisms on planet Earth. They lived millions of years before the life and death of the dinosaurs and they still live today.
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