Scientific Explorers looks at scientific explorations on land, at sea, and in space--Captain James Cook's astronomical observations, the Great U.S. Exploring Expedition of the 1830s, the mapping expeditions and geological surveys of the American West by Fremont and others, and many more exciting and dramatic discoveries--by James Cook, Lewis and Clark, Charles Darwin, Alvin, Jacques Cousteau, and others--that have changed the way we view the world.