Nationalgeographic: Design your own seashell

Math is everywhere. It’s a gateway to understanding the beauty of our natural world, from tree branches (fractals) to flower petals (the Fibonacci sequence). But you don’t need to love math to appreciate nature’s wonders. Take seashells, for example. All shells start with a spiral. Shell shapes are determined by both simple and complex physical processes—dilating, coiling, twisting, and more. Here you can build your very own seashell. See if you can design one that a mollusk might be proud to call home: nationalgeographic.com/science…