We’re untangling the science and cultural history of hair on this week’s Please Explain with a leading expert on the fascinating fiber, Kurt Stenn, the author of Hair: A Human History. He served for over 20 years as a Professor of Pathology and Dermatology at the Yale University School of Medicine, in addition to working as the Director of Skin Biology at Johnson & Johnson where he helped found a biotech startup on hair follicle regeneration. He’ll talk about the evolutionary history of hair, in addition to its role in art, fashion, cultural identity and even the economy. 

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