Paul Erickson is assistant professor of history and science in society at Wesleyan University. Judy L. Klein is professor of economics at Mary Baldwin College. Lorraine Daston is director of the Max Planck Institute for the History of Science and visiting professor in the Committee on Social Thought at the University of Chicago. Rebecca Lemov is associate professor of the history of science at Harvard University. Thomas Sturm is a Ramon y Cajal Research Professor in the Department of Philosophy at the Autonomous University of Barcelona. Michael D. Gordin is professor of the history of science at Princeton University.