Smithsonian marine biologist Nancy Knowlton discusses Great Barrier Reef coral dieoff on PBS NewsHour In Animals, Marine Science, Science & Nature / 4 October 2012 Related posts: Smithsonian scientists help build first frozen repository of Great Barrier Reef coral Great Barrier Reef coral Acropora tenuis Smithsonian Conservation Biology Institute to help create frozen repository of sperm and embryonic cells for Great Barrier Reef corals A noisy reef is a healthy reef Tags: conservation biology