A new series of *More or Less*, BBC Radio 4's series devoted to all things numerical, starts on November 12th. Presenter **Andrew Dilnot** tells *Plus* about the motivation behind the programme.

When it comes to the science of the very small, strange things start happening, and our intuition ceases to be a useful guide. *Plus* finds out about the crazy **quantum world**, and spin that a politician would die for.

It was Euclid who first defined the **Golden Ratio**, and ever since people have been fascinated by its extraordinary properties. Find out if beauty is in the eye of the beholder, and how the Golden Ratio crosses from mathematics to the arts.

To make hard decisions, you need hard facts. **Medical statistics** can help us to decide what treatment to look for when we are ill, and to estimate our chances of recovery.

Ever since the thalidomide tragedy, governments have realised the importance of a strict licensing regime for new drugs. **Medical statistician** Robert Hemmings explains how his work for the Medicines Control Agency helps to safeguard the health of the nation.