The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
If the chemical sodium is dropped into water it will immediately and violently explode.
67
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Hot water can freeze faster than cold water.
181
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The average home creates more pollution than does the average car.
33
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71