A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Pumice is the only rock that floats on water.
14
A ball of glass will bounce higher than a ball made of rubber.
73
Research indicates that plants grow healthier when they are stroked.
173
The average home creates more pollution than does the average car.
33
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65