Dr James Fox explores how, in the hands of artists, the colours gold, blue and white have stirred our emotions, changed the way we behave and even altered the course of history. For the very first civilisations and also our own, the yellow lustre of gold is the most alluring and intoxicating colour of all.

Unreported World travels to the heart of the Brazilian Amazon rainforest to reveal just how some of the Earth's most isolated people are being affected by the world's financial crisis causing the price of gold to rise to record levels