The scientific exploration of the ocean is an extraordinary story. Hundreds have climbed Everest yet only two people have descended, in a homespun 'bathyscaphe', to the very depths of the deepest sea chasm. Amazing oases teeming with life have been found in deep sea volcanic vents but we have hardly begun to identify their resident species. We know that sea currents control our climate but we don't know how. Ocean scientists are pretty sure that we could reverse the greenhouse effect by manipulating plankton blooms with doses of iron ... but fear we might trigger an ice age in the act. Mapping the Deep is a state-of-the-ocean report on the sea and its science. After amazing you at how little you know of the ocean, Kunzig swiftly draws you into a compelling narrative of oceanographers past and present - scientists, pioneers, maverick thinkers, deep water divers and submersible pilots. Like all the best science books, this is a hugely informative page-turner that confirms Robert Kunzig's position in the top rank of popular science writers.