Enamel is hardest substance in the human body.
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The human brain has the capacity to store everything that you experience.
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The world's shortest man measures only 21.5 inches.
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We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
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The human sigh acts as a physiological reset button.
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Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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A person can live without food for about a month, but only about a week without water.
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It has been scientifically proven that stroking a cat can lower one's blood pressure!
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