Pumice is the only rock that floats on water.
14
Spain's capital Madrid means "place of abundant water".
29
By peeing in the shower, you can save 1,157 gallons of water a year.
31
Hot water can freeze faster than cold water.
181
Sound travels about 4 times faster in water than in air.
408
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Water is actually naturally blue.
48