Putting his robotics doctorate to good use, Anderson built a metal prototype, then machined the final version. Hand-cranked gears turn two cylinders, each etched with an image. The cylinders drag a penny through the gap between them, flattening and elongating the coin while pressing an image into both sides. Slifer, along with eight other artists, created more than a dozen penny designs, many showcasing critically endangered or extinct animals from North America. “The machine uses technology to speak critically about technology and our relationship with the natural world,” Anderson says.