Pumice is the only rock that floats on water.
14
Water is actually naturally blue.
48
Hot water can freeze faster than cold water.
181
Pure water (H2O) does not conduct electricity on its own.
46
The water of the Antarctica is so cold that nothing can rot there.
334
Sound travels about 4 times faster in water than in air.
408
A person can live without food for about a month, but only about a week without water.
156
Spain's capital Madrid means "place of abundant water".
29