The Future of the Ocean

Nancy Knowlton, the Sant Chair of Marine Science at the Smithsonian National Museum of Natural History, asks "What is the likely future of our ancestral home?" The answer depend on what humans do now and in the future, she says. Dr. Knowlton chronicles two possible futures of coral reefs by comparing an unhealthy reef to a healthy, resilient one and explores a success story in the increasing number of measures put in place worldwide to protect sharks.