Enamel is the hardest substance in the human body.

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The human body makes anywhere from 1 to 3 pints of saliva every 24 hours.

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In America, the most common mental illness is Anxiety Disorders.

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People with allergies can lower allergy reactions by laughing.

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For humans the normal pulse is 70 heartbeats per minute.

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The liver performs more than 500 different functions, including storing vitamins and removing harmful chemicals from the blood.

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On average, a man spends about five months of his life shaving.

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The number one cause of rabies in the United States are bats.

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It has been medically been proven that laughter is an effective pain killer.

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The eyeball of a human weighs approximately 28 grams.

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