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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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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.