Balsa wood is classified as a hard wood!
41
For every gallon of sea water, you get more than a quarter pound of salt.
45
The storage capacity of human brain exceeds 4 Terrabytes.
140
Hot water can freeze faster than cold water.
181
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One barrel of petroleum holds 42 gallons.
20