The average temperature at 40,000 feet above sea level is -60 F.
56
Iron weighs more after it rusts.
16
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
51
Diamonds can be shattered with a hammer.
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