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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
The horizontal fraction bar was introduced by the Arabs.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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).
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.