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How Does a Snail Enlarge Its Shell?
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A newborn snail may be tiny, but it already carries with it a small shell. As time goes by, the animal grows and its “house” also does. However, it does not need to abandon it to get another larger shell. The shell is an external structure produced by the animal itself and composed mainly of calcium carbonate and organic materials. Its growth occurs in a very particular way: the snail retains the old parts and adds new material at the edge of th…
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