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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.