# Articles

**Colin Adams**asks when is a molecule knot a molecule? and what happens if you try to build a knot out of sticks?

**Toby O'Neil**describes how the mathematical theory of dimension gives us a way of approaching the question.

**Rachel Thomas**looks at Shannon's life and works.

Suppose you have an infinitely large sheet of paper (mathematicians refer to this hypothetical object as the plane). You also have a number of different colours - pots of paint, perhaps. Your aim is to colour every point on the plane using the colours available. That is, each point must be assigned one colour.

Chomp is a simple two-dimensional game, played as follows.

Cookies are set out on a rectangular grid. The bottom left cookie is poisoned.

Two players take it in turn to "chomp" - that is, to eat one of the remaining cookies, plus all the cookies above and to the right of that cookie.

**C. J. Budd** and **C. J. Sangwin** show us how to create mazes, and explain why mazes and networks have much in common. In fact the study of mazes and labyrinths takes us into the dark territory of murder, suicide, adultery, passion, intrigue, religion and conquest...

**Matthew Keeling**describes some of the mathematical developments that have improved our understanding and predictive ability.

**Rob Eastaway**shows us how mathemagicians trade off the fact that you can usually predict precisely the outcome of doing something in mathematics, but only if you know the secret beforehand.

**Ian Garbett**discusses radioactive decay.