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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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There are more sensory neurons in the tongue than in any other part of the body.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The average adult has about 21 square feet of skin.