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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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The average adult has about 21 square feet of skin.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.