Indoor pollution is 10 times more toxic than outdoor pollution.
62
The average temperature at 40,000 feet above sea level is -60 F.
56
Most dust particles in your house are made from dead skin!
67
For every gallon of sea water, you get more than a quarter pound of salt.
45
Hot water can freeze faster than cold water.
181
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108