Dr. Gregory Skomal is an accomplished marine biologist, photographer, and author. As a senior scientist with MA Marine Fisheries, he has been studying sharks for over 30 years. He has written numerous scientific research papers and has appeared in a number of film and television documentaries, including programs for National Geographic, Discovery Channel, and PBS. He has been an avid diver and underwater photographer since 1978. His most recent book, The Shark Handbook, explores the world of sharks.