Produced by the Chemical Heritage Foundation, this series is loosely structured around a look at a historical breakthrough in chemistry, its present day applications and possible future developments: this episode about the history of Teflon is a good example. Categorised into five main subject areas of Environment, History, Medicine, Society and Technology the series is aimed at the general listener rather than a specifically academic audience but is nonetheless interesting and scientifically rigorous in its approach. The podcasts are free to listen to and download and can also be subscribed to via iTunes.