MAA Found Math 2012 - Week 39

MAA Found Math: Roger Nelsen (Lewis & Clark College) submitted this week's photos with the following description: "This Fibonacci Spiral is one of several mathematically-themed floor tilings in the Percy Lavon Julian Science and Mathematics Center on the campus of DePauw University in Greencastle, Indiana."

"This evolute of an ellipse (an evolute of a curve is the locus of its centers of curvature)," wrote Nelsen, "is one of several mathematically-themed floor tilings in the Percy Lavon Julian Science and Mathematics Center on the campus of DePauw University in Greencastle, Indiana."

See math in the world around you? Send your photos to editor@maa.org.