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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
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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Medication errors are more common among seriously ill patients than with those with minor conditions.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.