Gino Segre has a bachelor's degree in physics from Harvard, attended the Massachusetts Institute of Technology for graduate school, and spent time in Europe for postdoctoral work. He began teaching at the University of Pennsylvania in 1967. A long-term interest in history led him to begin writing about science history.
Bettina Hoerlin holds a doctorate in policy sciences and taught at the University of Pennsylvania for seventeen years, having previously served as health commissioner of Philadelphia. She was also a visiting professor at Haverford College. She lives with her husband, physicist Gino Segre, in Philadelphia.
Tim Campbell is the Audie and AudioFile Earphones Award-winning voice of hundreds of audiobook titles in almost every literary genre.