Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
Hot water can freeze faster than cold water.
181
Iron weighs more after it rusts.
68
Aluminum used to be more valuable than gold!
84
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A cubic yard of air weighs about 2 pounds at sea level.
31
Pumice is the only rock that floats on water.
14