Iron weighs more after it rusts.
68
Sound travels about 4 times faster in water than in air.
408
The only letter not appearing on the Periodic Table is the letter "J".
180
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7