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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).
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.