Part of DK's best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a new 'eyewitness' feature - fascinating first-hand accounts from experts in the field. Meet jet-propelled octopuses and hermit crabs, look at seaweed, find out how waves form, and discover the submarines and submersibles that have explored shipwrecks and the deepest trenches. Learn about prehistoric oceans and find out how people are trying to protect the oceans of the future.