As you know, the Earth is a watery place. But just how much water exists on, in, and above our planet?
MORE: http://ga.water.usgs.gov/edu/earthhowmuch.html#.T7IcT-3N7wy
See also...
This Tiny Sphere is All the World's Water
http://blogs.discovermagazine.com/80beats/2012/05/14/this-tiny-sphere-is-all-the-worlds-water/
