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Author Question: In comparative studies of true smiles (with emotion of happiness) and lie smiles (without emotion of ... (Read 69 times) |
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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.