Will technology make Braille obsolete as the primary reading tool for blind people? Will talking apps and audiobooks win out over embossed dots? Braille has been written off before; each time it has come back stronger. We trace Braille from its beginnings in Napoleon's France, through the "War of the Dots" in the early 20th century to the age of the smart phone, and beyond.

Photo by Brickset. Music in the episode from Marcel, Blue Dot Sessions, Podington Bear, Cuicuitte and gargle. More on contributors Sheri Wells-Jensen here, Joshua Miele here and Chancey Fleet here. Read a transcript of this episode here.