Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Aluminum used to be more valuable than gold!
84
Balsa wood is classified as a hard wood!
41
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Hot water can freeze faster than cold water.
181
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
4.5 pounds of sunlight strike the Earth each day.
27
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75