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Over time,
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what happened was the cartilage cells
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that were in this scaffold grew into cartilage
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in the same shape as the scaffold that they used.
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Here's what looks like a
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human ear growing on the ear of a rabbit.
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A dramatic demonstration,
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and when they took this ear out of the rabbit,
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obviously it's not a real ear,
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it doesn't hear,
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it's all the cartilage that forms the outer part of your ear.
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If you took a section of this later and looked inside,