Why (and for how long) do butterflies stay in a cocoon? In this episode of Blue Sky Science, Jeremy Hemberger, a graduate student in the entomology department, answers that question posed by six-year-old Sophie Harrison.

Blue Sky Science is a collaboration of the Wisconsin State Journal and the Morgridge Institute for Research. Scientific questions are posed by visitors to Science Saturdays, a monthly series at the Discovery Building that features interactive exploration stations centered around a particular topic. The Blue Sky Science team then sets out to find an expert to answer the questions.

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