Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Iron weighs more after it rusts.
16
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
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
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42