VOYAGE OF THE H.M.S. CHALLENGER

The H.M.S. Challenger sails from Portsmouth,

England and begins a four-year journey around the world. During the voyage, scientists test the salinity, temperature and density of the seawater. Information is also collected about ocean currents, sediment, and meteorology. The crew discovers underwater mountain chains and hundreds of species previously unknown. This research is eventually consolidated into a fifty-volume research report known as

The Challenger Report. This research forms the basis of modern oceanography.