One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The bark of an older redwood tree is fireproof.
65
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Cold water weighs more than hot water.
93
Nylon is made from coal and petroleum.
42
A cubic yard of air weighs about 2 pounds at sea level.
31
Scientists are now able to grow 'beating' heart tissue in a lab!
162