Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
In zero gravity, a candle's flame is round and blue.
16
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
4.5 pounds of sunlight strike the Earth each day.
27
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
Scientists in Germany have developed a candy that doesn't cause cavities.
11