Obsessive nose picking is called Rhinotillexomania.
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Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
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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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The average person's skin weighs twice as much as their brain.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The human body contains over a billion miles of DNA.
147
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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