Constructed from seven square cylinders, each made from a strip of four squares, this model of an unfolded hypercube, created by Thomas F. Banchoff, collapses into a flat, two-dimensional configuration.
Ivars Peterson is a freelance writer and editor. He was Director of Publications at the Mathematical Association of America from 2007 to 2014. As an award-winning mathematics writer, he previously worked at Science News for more than 25 years and served as editor of Science News Online and Science News for Kids. His books include The Mathematical Tourist, Islands of Truth, Newton's Clock, and Fragments of Infinity: A Kaleidoscope of Math and Art.