## reaction-diffusion equations

A mathematical cancer model may lead to personalised treatment

**Peter Markowich**is a mathematician who likes to take pictures. At first his two interests seemed completely separate to him, but then he realised that behind every picture there is a mathematical story to tell.

*Plus*went to see him to find out more, and ended up with a pictorial introduction to partial differential equations.

**Lewis Dartnell**solves these, and other, puzzles of animal patterning.