Voyage of the Challenger: The Atlantic: A Preliminary Account of the General Results of the Exploring Voyage of HMS Challenger during the Year 1873 and the Early Part of the Year 1876

In 1871 the British government agreed to support an expedition to collect physical and chemical data and biological specimens from the world's oceans. Led by Charles Wyville Thomson (1830–82), the expedition used HMS Challenger, refitted with laboratories. They sailed nearly 70,000 nautical miles around the world, took soundings and water samples at hundreds of stops along the way, and discovered more than 4,000 new marine species. Noted for the discovery of the Mid-Atlantic Ridge and the P...