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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The longest a person has survived after a heart transplant is 24 years.