# creativity

Marcus du Sautoy begins a two part exploration of the greatest unsolved problem of mathematics: The
Riemann Hypothesis. In the first part, we find out how the German mathematician Gauss, aged only 15, discovered the dice that Nature used to chose the primes. |
Not only are paper models of geometric shapes beautiful and intriguing, but they also allow us to visualise and understand some important geometric constructions. Konrad Polthier tells us about the gentle art of
paper folding. |

In the first of a new series 'Imaging Maths',
Plus takes an illustrated tour of an extraordinary geometric construction: the Klein bottle. |