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Did you know?
The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.