Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Iron weighs more after it rusts.
16
Hot water can freeze faster than cold water.
181
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Your brain is 80% water.
525
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The average temperature at 40,000 feet above sea level is -60 F.
56
The average home creates more pollution than does the average car.
33