Dr Chris Smith and the Naked Scientist team present the latest science news, analysis and breakthroughs. In today’s programme - your questions go under the microscope: including why don’t whales and dolphins drown when they go to sleep? Is it true that a fungus from a nuclear reactor can help patients undergoing radiotherapy?And do magnets around your water pipes prevent limescale building up? Plus, when the whistle goes for half time, we’ll have a quiz for you to have a go at too! Get the podcast from the BBC Sounds app.