Do you know that moment when you feel for the right key at the front door? Or when you fish your favourite pen out of your bag simply using touch? Braille readers have turned this skill of seeing with their hands into an art form. Louis Braille, blinded in an accident during his childhood, invented braille: a language of touch. Consisting of a logical system of six dots, braille remains the most commonly used script for blind people worldwide — a number that stands at 40 million strong. Fun fact, Louis Braille based his system on an earlier system used by the French army to communicate at night!