Chinese artist Cai Guo-Qiang has spent decades using gunpowder as a medium for paintings and performances. Although the explosions are momentary and ephemeral, the records of these events are works of art collected by museums around the world. When Cai began to wonder about the longevity of this unusual material, he turned to the scientists at the Getty Conservation Institute (GCI). In this episode, the artist discusses his relationship with this unorthodox medium and is joined by GCI scientists Rachel Rivenc and Tom Learner to talk about the research collaboration he is undertaking with the institute.