Spheres, pentagons, hexagons, spirals, fractals. They disguise themselves as animals, galaxies, planets or flowers in the immensity of the universe. Nature hides numerous mathematical forms among its wonders: in cobwebs, sea snails, pine cones or Romanesque broccoli and many other of its inert creatures and objects. In this book we will discover the geometries and m agic numbers of the m on.