Watch a Rare Glimpse Inside a Butterfly’s Cocoon

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A butterfly’s transformation is complex in itself, but the way its wings form is another story. Researchers at the University of California Berkeley discovered a way to see firsthand how they grow.

Footage courtesy of bioGraphic, an online magazine powered by the California Academy of Sciences. Check out their full story here.

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Watch a Rare Glimpse Inside a Butterfly’s Cocoon

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