Most dust particles in your house come from dead skin.
48
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Aluminum used to be more valuable than gold!
84
Scientists are now able to grow 'beating' heart tissue in a lab!
162
The earth is approx. 6,588,000,000,000,000,000 tons.
175
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199