Iron weighs more after it rusts.
16
One ragweed plant can release as many as one billion grains of pollen!
51
Hot water can freeze faster than cold water.
181
Diamonds can be shattered with a hammer.
-104
Nylon is made from coal and petroleum.
42
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71