Great white sharks don’t just get bigger with age, they grow entirely new kinds of teeth that transform how they hunt. Great white sharks change far more than their size as they age. A Life Marked by Shifting Teeth and DietsFrom birth, great white sharks (Carcharodon carcharias) rely on teeth that reflect their early survival needs. Such findings challenge older assumptions in paleontology, where fossilized shark teeth are often used to classify extinct species. Credit: Emily HuntWhy Tooth Changes Make Sharks More Efficient PredatorsThe emergence of serrated teeth in older sharks dramatically increases their hunting efficiency.