Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Iron weighs more after it rusts.
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One gallon of used motor oil can ruin approximately one million gallons of fresh water!
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All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
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Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A single speck of dust is half way in size between a subatomic particle and the Earth.
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