Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
One third of the electricity produced on earth is used to power electric light bulbs!
75
For every gallon of sea water, you get more than a quarter pound of salt.
45
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117