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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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There are more nerve cells in one human brain than there are stars in the Milky Way.