The Why Factor - Gold
That gold is rare and valuable is of course well known but beyond that why are so many people around the world obsessed with it?
Gold - what is it about this rare, inert metal which has captivated us for thousands of years? The answers may not be what you might think. Mike Williams explores our obsession with gold. He looks at chemistry, Einstein's theory of relativity and the many myths and mystery of glorious gold. (Image of gold bars. Credit AFP/Getty Images)