Sound travels about 4 times faster in water than in air.
408
If you get water flowing fast enough, it can cut metal.
354
By peeing in the shower, you can save 1,157 gallons of water a year.
31
A portion of the water you drink has already been drunk by someone else, maybe several times over.
170
Spain's capital Madrid means "place of abundant water".
29
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219