Much of the world's oceans remain unexplored. Underwater drones help researchers find shipwrecks and learn more about ocean habitats. This book explains how these drones work and how they can be used to make scientific breakthroughs now and in the future. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, an infographic, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards.