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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."