## chaos

**Colva Roney-Dougal**explores the maths, from chaos to group theory.

**Caroline Series**and

**David Wright**give a short introduction to the maths behind their beautiful images.

**Robert L. Devaney**explores the maths behind these beauties and shows that they're loaded with mathematical meaning.

Physicists create a quantum Newton's cradle - and witness an absence of chaos for the first time.

**Nick Collins**talks to

*Plus*about his artificial musician.