In this episode of Conversations, we sit down with Dr. Sara Walker, an astrobiologist and theoretical physicist who is reshaping the way we think about life. From her work on the origins of life to her innovative assembly theory, Sara takes us on a journey through the possibilities of discovering alien life and challenges some of the core tenets of biology and physics. This conversation will make you rethink not just how life began, but what life is and does. Find show notes, transcript, and more at thenocturnists.org. The Nocturnists is made possible by the California Medical Association and donations from listeners like you.