Six-year-old Piper Hirsch had a question on her mind: “How do cows make milk?”

Her question was answered by assistant professor of dairy science Laura Hernandez, an expert in lactation biology, in a recent episode of Blue Sky Science.

Blue Sky Science is a series of videos answering questions about science and featuring UW-Madison experts. The CALS community has fielded a number of additional questions for this project, including “How do seedless plants start?,” “Is it possible to bring back extinct animals?,” and “Do trees get viruses?“

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