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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.