To break the numbers down, 96.5% of all the Earth's water is contained within the oceans as salt water, while the remaining 3.5% is freshwater lakes and frozen water locked up in glaciers and the polar ice caps. Of that fresh water, almost all of it takes the form of ice: 69% of it, to be exact.
Madison is a city in Lake County, South Dakota, United States. The population was 6,474 at the 2010 census. It is the county seat of Lake County and is home to Dakota State University. Madison is located at 44Â°0â²28â³N 97Â°6â²53â³W / 44.00778Â°N 97.11472Â°W / 44.00778; -97.11472 (44.007734, -97.114738). According to the United States Census Bureau, the city has a total area of 4.3 square miles (11.1 kmÂ²), all of it land.
Lewis and Clark crossed Madison Valley in 1805, but it would be several more years before settlers discovered the area. Gold was discovered in Alder Gulch in 1863 bringing on The Rush. Madison County was created in 1864 in what was then Idaho Territory. The area was designated Montana Territory that same year. Two months after gold was discovered in Alder Gulch, William Ennis homesteaded the site along the Madison River which quickly became the Town of Ennis. Mr. Jeffers did likewise across the river.