Prehistoric Sharks TOOB®
Since shark fossils are so rare and difficult to find, scientists often use fossils of teeth to learn more about prehistoric sharks. Not only that, but the locations in which they find these fossils are also extremely important. In fact, paleontologists in France found small fossilized shark teeth deep in a limestone bed. From these, scientists were able to infer that sharks survived the mass extinction known as the “Great Dying” by swimming to deep waters and feeding on small fish. This flexibility in these prehistoric predators’ diet was enough to allow them endure the catastrophic event until more desirable food sources returned to shallower waters.