The Dead Sea, 417 m below sea level, is the lowest point on the surface of the earth. It is at the terminus of the Jordan River, has no outlet and is very rich in minerals. The dissolved material includes high concentrations of potassium, bromine and magnesium salts, which are commercially exploited. It has a salinity of 3,000 mg/l, and is the world's saltiest large water body. Almost nothing can survive in this water except highly specialized green algae and red archaeobacteria which are of great scientific interest. It has a surface area currently of 810 square kilometers, 1/3 smaller than its natural size. It has a depth of 330 meters.