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Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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Thyroid conditions may make getting pregnant impossible.