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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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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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There are more bacteria in your mouth than there are people in the world.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%