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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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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."
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.