In an age of unprecedented exploration and innovation, our oceans remain largely unknown, and endlessly fascinating. Streever celebrates the daring pioneers who tested the limits of what the human body can endure under water as he traces both the little-known history and exciting future of how we travel and study the depths. He covers seventeenth-century leather-hulled submarines, their nuclear-powered descendants, and robots capable of roving unsupervised between continents. Discover all the adventures our seas have to offer-- and why they are in such dire need of conservation. -- adapted from jacket.