The adult human brain weighs about 3 pounds (1,300-1,400 g).
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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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There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
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It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
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The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
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