Scientists have discovered that the extinct megalodon shark was warm-blooded, as indicated by the isotopes in its tooth enamel. Their research suggests that the megalodon could maintain a body temperature about 13 degrees Fahrenheit warmer than the surrounding water, a significant difference compared to other contemporary sharks. A killer, yes. But analysis of tooth minerals reveals how the warm-blooded predator maintained its body temperature. Researchers have determined that the extinct megalodon shark was warm-blooded, able to maintain its body temperature higher than the surrounding water. However, the energy needed for this temperature regulation might have contributed to the megalodon’s extinction...