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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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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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).