These prehistoric teeth were the sharpest the world has ever known

Two hundred million years ago, the world's most fearsome fangs came bundled in an appropriately bite-sized package. Measuring just two inches long, eel-like creatures known as conodonts may not have looked like much from a distance — but up close, their mouths were the stuff of nightmares. » 3/16/12 11:30am 3/16/12 11:30am