Episode 10 of the Tartan Tardigrade, a podcast where scientists from the UK Centre for Astrobiology talk to guests from around the world about their research in astrobiology, their careers, and the prospects for life in the universe.In this episode we talk to Peter Vickers from Durham University, a philosopher who approaches astrobiology from a fresh perspective. We discuss how astrobiology fits in with the philosophy of science, and easy questions such as the nature of truth.