David Shiffman

David Shiffman (SILVER SPRING, MD) is a marine conservation biologist at Arizona State University. His work has appeared in the Washington Post , National Geographic , and Scientific American , and he writes a monthly column in Scuba Diving Magazine . He can be found on Twitter at @WhySharksMatter, where he's always happy to answer questions about sharks.

David Shiffman (SILVER SPRING, MD) is a marine conservation biologist at Arizona State University. His work has appeared in the Washington Post , National Geographic , and Scientific American , and he writes a monthly column in Scuba Diving Magazine . He can be found on Twitter at @WhySharksMatter, where he's always happy to answer questions about sharks. See less