The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
One cubic foot of gold weighs more than 1,200 pounds!
78
Iron weighs more after it rusts.
16
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
A cubic yard of air weighs about 2 pounds at sea level.
31
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199