Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The force of a suction cup is calculated using F=AP.
15
Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
1
Your brain is 80% water.
525
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Hot water can freeze faster than cold water.
181