Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Iron weighs more after it rusts.
68
No matter how cold it gets, gasoline will not freeze.
107
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The bark of an older redwood tree is fireproof.
65
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15