We learned in our previous episode about the very real consequences that extreme heat has on human health and wellbeing, but there is little research into what actually happens to our bodies when exposed to extreme heat apart from in the world of sports science. In the second part of our discussion, as fears mount that the Tokyo Olympics will be the hottest on record and the world gears up for Cop26, Shivani Dave speaks to Mike Tipton, a professor of human and applied physiology. Help support our independent journalism at theguardian.com/sciencepod