The human brain has the capacity to store everything that you experience.
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Your thumb is about the same size as your nose.
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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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It takes about 20 seconds for a red blood cell to circle the whole body.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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The average sperm cell swims at 8 inches per hour.
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Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
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The adult human brain weighs about 3 pounds (1,300-1,400 g).
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