Your brain is 80% water.
525
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
For every gallon of sea water, you get more than a quarter pound of salt.
45
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Sound travels fifteen times faster through steel than through air.
134
Pure water (H2O) does not conduct electricity on its own.
46
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39