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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.