In this week's podcast, we explore the nature of evidence, and especially testimony. We  ask what kinds of evidence we can access when trying to understand how the Holocaust unfolded. Why, for example, is the study of a genocide like the Holocaust beset by controversy? Why do some want to deny it ever happened? In the face of such abhorrent beliefs, understanding that there is an overwhelming evidence base in support of the fact of the Holocaust is crucial. Beyond this, this episode explores how testimony came to be one of Holocaust Studies' favoured modalities for exploring the lives of the victims. When did testimony emerge as the dominant mode for thinking the Holocaust and why? Finally, we explore the extent to which Holocaust songs can be thought of as a kind of testimonial material.