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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.