Sound travels fifteen times faster through steel than through air.
134
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
In zero gravity, a candle's flame is round and blue.
16
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
The sun is 330,330 times larger than the earth.
75
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
One barrel of petroleum holds 42 gallons.
20
A 'jiffy' is an actual unit of time for 1/100th of a second!
66