Iron weighs more after it rusts.
16
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
A cesium atom in an atomic clock beats over nine billion times a second.
43
Liquid TIDE laundry detergent glows under a blacklight.
96
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
For every gallon of sea water, you get more than a quarter pound of salt.
45
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Indoor pollution is 10 times more toxic than outdoor pollution.
62