Shark jaws of old.

Jaws large enough to consume a Volkswagon Beetle are on display as part of a new permanent exhibit on sharks at the Smithsonian's National Museum of Natural History in Washington, D.C. The fiberglass reconstruction houses the teeth of the 40-foot prehistoric shark Carcharodon megalodon, which became extinct 4 million years ago. The triangular, serrated teeth were donated by fossil hunter Peter J. Harmatuk of Bridgeton, N.C. The teeth are graded in size from 6 inches in length in the front of the jaw to 1 inch in the back. The shark used its teeth to slash through flesh and bones of whales. The nearest living relative of the Carcharodon is the great white shark, which is only 20 feet long.