Balsa wood is classified as a hard wood!
41
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
For every gallon of sea water, you get more than a quarter pound of salt.
45
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Most dust particles in your house come from dead skin.
48
Research indicates that plants grow healthier when they are stroked.
173