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Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.