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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.