## Articles

**John L. Casti**tells us how today's mathematicians are using computers to carry on the work of turn-of-the-century polymath d'Arcy Wentworth Thompson, who showed how mathematical functions could be applied to the shape of one organism to continuously transform it into other, physically similar organisms.

**Emily Dixon**takes a break and discovers that codes are not just for sleuths.

**John Webb**applies some divergent thinking, taking in the weather, traffic flow and card shuffling along the way.

**John D. Barrow**explains.

**John H. Webb**explains.

**Chris Sangwin**and

**Chris Budd**tell us about a different kind of sundial, the analemmatic design, where you can use your own shadow to tell the time.

**Richard P. Taylor**explains that Pollock's patterns are really fractals - the fingerprint of Nature.