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Did you know?
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).
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There are 20 feet of blood vessels in each square inch of human skin.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.