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