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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On average, there's 100 billion neurons in the human brain.
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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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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.
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At age 70, more than 70 percent of men are still potent!
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You have no sense of smell when you're sleeping!
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Gardening is said to be one of the best exercises for maintaining healthy bones.
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