Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Iron weighs more after it rusts.
16
Most dust particles in your house are made from dead skin!
67
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A ball of glass will bounce higher than a ball made of rubber.
73
Sound at the right vibration can bore holes through a solid object.
134
Nylon is made from coal and petroleum.
42