Fossil of ancient shark that swam during the age of dinosaurs solves age-old mystery

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During the Cretaceous period, a lineage of sharks roamed the seas with rows of unusual teeth. These teeth were usually large and round, and were not designed to cut their prey, but to grind and crush armored creatures.

However, because the sharks' fossil remains consisted largely of individual teeth, scientists are still left to speculate about what the rest of this ancient predator may have looked like since its discovery in the 18th century.

Now, remains unearthed from limestone quarries ...