Suzanne Martyl Langsdorf is the daughter of Alexander Langsdorf, a Manhattan Project physicist and one of the founders of the Bulletin of the Atomic Scientists, and Martyl Langsdorf, an artist who designed the iconic Doomsday Clock. In this interview, Suzanne describes her parents’ personalities and interests, their family life together, and the homes they lived in during her childhood. She gives a closer look at the lives of her parents including how they met, their marriage, and their respective careers. Suzanne recalls her unique childhood with her thoughtful father and her independent mother. She also explains how her mother came up with the now-famous Doomsday Clock design, and her father’s nuclear nonproliferation efforts.