Endocrine disrupting chemicals like bisphenol A have been making news lately, with several states passing regulations limiting or banning their use. The trajectory of BPA is similar to another chemical, commonly known as DES, once prescribed for pregnant and menopausal women. Host Jeff Young talks with Professor Nancy Langston about the history of endocrine disrupting chemicals and how this history can inform future chemical regulation. Her book is called, “Toxic Bodies: Hormone Disruptors and the Legacy of DES.”