Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
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
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Your brain is 80% water.
525
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13