Water is actually naturally blue.
48
Blue eyes are the most sensitive to light, dark brown the least sensitive.
105
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
There are more than 10 million bricks in the Empire State Building!
75
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
The roar that we hear when we place a seashell next to our ear is not the ocean, but rather the sound of blood surging through the veins in the ear.
476
More than 50% of Americans fall asleep on their sides.
86