The average temperature at 40,000 feet above sea level is -60 F.
56
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
For every gallon of sea water, you get more than a quarter pound of salt.
45
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65