In this episode, Audrow Nash interviews James Conrad, professor at the University of North Carolina at Charlotte, about the history of the autonomous walking robot, Stiquito. Stiquito is a small, inexpensive hexapod (i.e., six- legged) robot that has been used since 1992 by universities, high schools, and hobbyists. It is propelled by nitinol, an alloy actuator wire that expands and contracts, and roughly emulates the operation of a muscle. Nitinol contracts when heated and returns to its original size and shape when cooled. The robot can be outfitted with several sensors for more advanced behavior, such as obstacle avoidance, line following, and light tracking.