## 48

**Steven J. Brams**proposes an alternative voting system that could help make things more democratic.

**Lewis Dartnell**looks at some stunning examples.

**Chris Hollings**reveals that our number system, much used but rarely praised, is in fact a work of genius and took millennia to evolve.

**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.

*Plus*went to see him to find out more about his career.