Leah DeVun focuses on the history of science and the history of gender, sex, and sexuality in medieval and early modern Europe. She also studies the legacy of these concepts in the modern world. Her current project is Enter Sex: Science, Hermaphrodites, and the Demands of Difference, which examines the history of sex difference by looking at how scientists and physicians have conceived of biological sex -- particularly through their approaches to intersex and transgender people -- in the past and present. She is the author of Prophecy, Alchemy, and the End of Time, which is forthcoming from Columbia University Press. She also writes about feminism and culture for a number of popular magazines.