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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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Your heart beats over 36 million times a year.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.