The average temperature at 40,000 feet above sea level is -60 F.
56
The smell of freshly cut grass is actually a plant distress call.
31
Diamonds can be shattered with a hammer.
-104
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
No matter how cold it gets, gasoline will not freeze.
107
The bark of an older redwood tree is fireproof.
65