This month we discuss Grunt: the curious science of humans at war by Mary Roach. The military is a huge investor in scientific and technological development. Mary Roach gained access to those who carry out research into those technologies of warfare that aren’t to do with weapons. Her book looks at how humans respond to extremes of noise, heat and exhaustion, as well as attempts to combat diarrhoea and the replacement of privates’ privates. Hear an extract from the book, an interview with Mary Roach, and the views of the Chemistry World team in this month’s podcast. Listen here or subscribe to the podcast using the links below. You can read our review of Grunt: the curious science of humans at war here, and find all our book reviews here. We want to include you, the Chemistry World  reader, in the conversation so join us next month when we’ll be discussing Science and the City by Laurie Winkless. Tweet your thoughts to @ChemistryWorld, or use the hashtag #BookClubCW and we’ll endeavour to include your opinions (or questions) on the podcast.