In this episode, Audrow Nash interviews Domenico Prattichizzo, Professor of Robotics at the University of Siena and Senior Scientist at the Istituto Italiano di Tecnologia in Genova in Italy, about a device for assisting people who have lost the use of one of their hands, for example by a stroke. The device is an extra finger that functions to press an object into the paralyzed hand so that it can be grasped.