Meet George Burgess, director of the Florida Program for Shark Research, as he explains why sharks are endangered, the main reason for shark overfishing and what the world would be like without sharks. This video is featured in the Florida Museum's national traveling exhibition, "Megalodon: Largest Shark that Ever Lived." The exhibition features a 60-foot-long walk-through sculpture and highlights the evolution, biology and misconceptions regarding giant prehistoric sharks. Visit www.flmnh.ufl.edu/megalodon/ for more information. Less