Pumice is the only rock that floats on water.
14
Pure water (H2O) does not conduct electricity on its own.
46
By peeing in the shower, you can save 1,157 gallons of water a year.
31
Spain's capital Madrid means "place of abundant water".
29
A portion of the water you drink has already been drunk by someone else, maybe several times over.
170
Penguins have a gland above their eye that turns saltwater into freshwater.
12
A person can live without food for about a month, but only about a week without water.
156