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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.