What happens when the scientist... becomes the subject? We're examining the strange world of self-experimentation, from the history of martyr medics and kooky romantics, to the modern biologists dosing themselves with DIY COVID vaccines in the months after the pandemic began. Plus, is mixing vaccines the best way to fight coronavirus? Scientists capture an elusive element, number 99... and the physics behind why wombats poo in cubes! Like this podcast? Please help us by supporting the Naked Scientists