## Articles

**Robert Hunt**concludes our Origins of Proof series by asking what a proof really

*is*, and how we know that we've actually found one. One for the philosophers to ponder...

**Jon Walthoe**explains why Benford's Law says otherwise, and why tax inspectors are taking an interest.

**Jon Walthoe**explains the tricks involved and how great thinkers like Pythagoras, Newton and Gödel tackled the problems.

**Helen Mason**explains.

**Martin Turner**takes you on a journey from the motion of a microscopic particle to the creation of imaginary moonscapes.

*fractal*, introduced in the mid 1970's by Benoit Mandelbrot, is now commonly used to describe this family of non-differentiable functions that are infinite in length. Find out more about their origins and history.

**Geoffrey Grimmett**explains how probability is at the heart of it all.