Experimenting, translating, and philosophizing about physics and metaphysics, biology and geology, two great thinkers from Central Asia stand out both for their achievements, and their completely opposite points of view. This week on The Medieval Podcast, Danièle speaks with S. Frederick Starr about the work and the lives of Ibn Sina (aka Avicenna) and Biruni, their contributions to science and culture, and the reason they outright despised each other.