Callum Roberts is a marine scientist and conservationist at the University of York in England and author of The Unnatural History of the Sea. His book charts the effects of 1000 years of hunting and fishing on ocean life and won the 2008 Rachel Carson Environment Book Award of the Society of Environmental Journalists. Callum's research has revealed the extraordinary rise and fall of fisheries over the last 200 years, but also shows how life can make a remarkable comeback after protection is granted. His team at York provided the scientific case for the world's first network of high seas marine reserves in the North Atlantic that in 2010 placed nearly 300,000km2 of ocean under protection. Callum works with many environmental charities and is a WWF UK Ambassador, trustee of Seaweb, Fauna and Flora International and Blue Marine Foundation, and advisor to Save our Seas. His next book, The Ocean of Life, explores how the oceans are changing under human influence and will be published in 2012.