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They're just scouting along, right,
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being caterpillars.
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At some point, these cells show up called imaginal cells.
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Scientists don't know where they come from
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or why they appear,
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but these imaginal cells show up inside the caterpillar
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and say, "Get psyched, caterpillar!
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It's butterfly-turning-into time."
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And what do all the other caterpillar cells do
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when these imaginal cells show up?
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I have no idea.
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They attack 'em!