## chaos

**Lewis Dartnell**explained how chaos on the brain is not only unavoidable but also beneficial. Now he tells us why the same is true for our solar system and sends us on a journey that has been travelled by comets and spacecraft.

**Lewis Dartnell**, it could be that the mathematical phenomenon of chaos is a crucial part of what makes our brains work.

*Plus*, we heard how a simple mathematical equation became the subject of a debate in the UK parliament.

**Chris Budd**and

**Chris Sangwin**continue the story of the mighty quadratic equation.

**chaos**.

**mathematical modelling**.

You play tennis like a champion compared with the best of robots, if you play tennis at all.

**Keith Moffatt**tells us about three of the posters from the series.

**Imre Leader**looks at the colourful world of Ramsey Theory.

**John D. Barrow**explains.