4.5 pounds of sunlight strike the Earth each day.
27
Research indicates that plants grow healthier when they are stroked.
173
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Iron weighs more after it rusts.
16
A cesium atom in an atomic clock beats over nine billion times a second.
43
One barrel of petroleum holds 42 gallons.
20
In zero gravity, a candle's flame is round and blue.
16
Most dust particles in your house come from dead skin.
48