The human brain has the capacity to store everything that you experience.
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Our eyes are always the same size from birth, but our nose and ears never stop growing.
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For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
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Enamel is hardest substance in the human body.
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The human brain doesn't stop developing until about 25 years old.
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It takes about 20 seconds for a red blood cell to circle the whole body.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
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Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
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