Left: The round, flat leaf of Pilea Peperomioides, the Chinese money plant. Right: A computer model of a Voronoi diagram traces the leaf’s central hydathode pores and looping reticulate veins. Credit: Navlakha lab/CSHL People often spot familiar shapes in random places. Maybe you have looked at the clouds and imagined a sailboat, a seahorse, or even your great-aunt Rosemary staring back at you. Scientists call this tendency to find meaningful patterns in randomness "apophenia." But in some