|
|
There are more nerve cells in one human brain than there are stars in the Milky Way.
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).
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.