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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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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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Vaccines prevent between 2.5 and 4 million deaths every year.