Image: Jelte van Abbema
Dutch designer Jelte van Abbema created a typeface out of e. coli bacteria. Cliff Kuang wrote in Fast Company about how he did it:
Van Abbema created the font by stamping bacteria into paper, and then placing the paper in a jury-rigged incubator, which provided the right humdity and warmth for the organisms. As they multiplied and died, the resulting fonts changed color and shape. As van Abbema says, bacteria "transforms the image to something new," creating something that is literally alive, changing every minute without ever being tended.