By

Watch a Rare Glimpse Inside a Butterfly’s Cocoon

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.

Watch a Rare Glimpse Inside a Butterfly’s Cocoon