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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.
Did you know?
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
Did you know?
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.