Book excerpt: DK Eyewitness Books: Shipwreck is a spectacular and informative guide to some of the world's most significant shipwrecks. Richly detailed, full-color photographs of submerged wrecks and their lost cargoes and treasures offer a unique "eyewitness" view of ships and the lives of those who sailed them. See the beautifully preserved figurehead of the Hamilton wreck, the five-hundred-year-old elephant's tusk recovered from the bottom of the ocean, and scissors that still cut paper and cloth after two hundred years beneath the sea. Learn how the wreck of the Mary Rose was raised from the seabed, why Grace Darling became a hero, how a deck seat converts into a lifeboat, how shipwrecks are located, and different preservation techniques used by underwater archaeologists. Discover what caused the "unsinkable" Titanic to sink, the use of the giant light bulb, harmonicas that still play after one hundred years underwater, the hazards faced by ships at sea, and much, much more! Discover the world of shipwrecks and an amazing wealth of undersea treasures and secrets with Eyewitness: Shipwreck.