BioPOD is the official podcast of the School of Biological Sciences at the University of Edinburgh. It is an interview show, and the researchers do most of the talking. The interviewer changes from episode to episode: Markela introduces the science and policy conversation, and Nitara introduces the one on fossil mammals. The first question is often the same, a request to explain the field before anything else. What is a biosignature? What does the neurobiology of fossil animals involve when the brain cannot be studied directly? Those first answers give a newcomer a footing before the detail arrives. Some guests are based at the University of Edinburgh, including at the UK Centre for Astrobiology. Others come from the University of Warwick and the ICP in Barcelona. In 'Cattle Disease', recorded at the Roslin Institute, Professor Jane Hope talks about tuberculosis in cattle and how expensive infection experiments are. The interview also explains what a large animal offers as a research subject: big blood volumes, repeated sampling over long periods, and tissues that human studies struggle to reach. The conversation even turns to cats infected with Mycobacterium bovis, the same pathogen that infects cows. Two episodes go back into deep time. An astrobiologist explains biosignatures and considers whether early fungi began in fresh water or the sea, which affects how old they might be. The same guest calls the subject 'a very living field', especially for the era before the explosion of animal life, when samples are rare and each new piece of rock can bring a discovery. In 'Fossil detective: piecing together the neurobiology of fossil mammals', Onela Bertrand, a mammalian paleontologist, describes how an ankle bone in early fossil whales gave physical evidence for a link to hippos that molecular data had already suggested. Other episodes turn to medicine and public life. 'Fertility: Research & Art' brings together three researchers who used glass art pieces to start public conversations about early embryo development. It traces how eggs and embryos are lost at each stage of IVF, and the talk also reaches mosaicism and the use of frog models. A series on science and policy brings in Joyce Tate, whose career spans academia, government and innovation. That interview covers the regulation of pesticides and genetically modified crops. Its sharpest point compares the agrochemical industry with IBM misjudging the personal computer. The guests talk conversationally rather than in rehearsed soundbites. A listener interested in evolution could start with the two fossil episodes. For someone curious about where research meets farming, fertility clinics and regulation, the cattle, fertility and policy episodes are the place to begin.