We all have to give a presentation at some point in our lives—on a stage, in a conference room, and, these days, on Zoom. So what makes a good speech? In this episode from How To! science writer David Epstein turns the microphone on Chris to find the answer. Chris breaks down some of the most famous talks of all time and solves an unusual challenge from a 6th-grader named Lucy: can he help her prepare for the biggest speech of her young life? This is an episode of How To!, a podcast from Slate. For more episodes, find it wherever you're listening to this.