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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).