Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
A cubic yard of air weighs about 2 pounds at sea level.
31
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
One ragweed plant can release as many as one billion grains of pollen!
51
In zero gravity, a candle's flame is round and blue.
16
Indoor pollution is 10 times more toxic than outdoor pollution.
62
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
