2 answers:
The dark brown color of a penny is most likely oxidation, which occurs when the copper in the penny comes in contact with oxygen.<span> </span>
You can leave it in water put dirt and stuff like that to get it dirty
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In the early 1960's, the United States tried to overthrow the communist leader, Fidel Castro. They were unsuccessful in the attempts.
Its so small can u make it bigger?
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smart i know