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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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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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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.