In zero gravity, a candle's flame is round and blue.
16
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Aluminum used to be more valuable than gold!
84
Most dust particles in your house come from dead skin.
48
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
A 'jiffy' is an actual unit of time for 1/100th of a second!
66