The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
