## Articles

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

**Ian Garbett**discusses radioactive decay.

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.

**Steven J. Brams**uses the Cuban missile crisis to illustrate the Theory of Moves, which is not just an abstract mathematical model but one that mirrors the real-life choices, and underlying thinking, of flesh-and-blood decision makers.

**Mark Wainwright**meets the pair and finds out how they did it.

**Ian Garbett**discusses light attenuation - the way in which light decreases in intensity as it passes through a medium.