This lavishly illustrated book provides a hands-on, step-by-step introduction to the intriguing mathematics of symmetry. Instead of breaking up patterns into blocks--a sort of potato-stamp ...

The spiral pattern of an Aloe polyphylla plant at the University of California Botanical Garden. Stan Shebs via Wikicommons under CC BY-SA 3.0 To the untrained eye, plants may appear to grow rather ...