On the anniversary of the first telegraph being sent, the team discover how the telegraph was used as a colonial tool in Ghana, and how an eccentric Brazilian emperor helped spark a communications revolution. They also reveal how tiny worms have helped scientists work out how our hearing works, and how bioelectricity might help focus your mind and heal your wounds. There’s a tale of evil seaweed causing havoc for coastal communities, a scientist studying misophonia makes a pitch for The Coolest Science in the World, and there’s a listener question about how chickens fly. And Marnie delves into a lesser known history of space flight, with the tale of a Zambian man who dreamt of being an astronaut.