How much gold is there in the world?
Warren Buffett, one of the world’s richest investors, says the total amount of gold in the world – the gold above ground, that is – could fit into a cube with sides of just 20m (67ft).
But is that all there is? And if so, how do we know?
A figure that is widely used by investors comes from Thomson Reuters GFMS, which produces an annual gold survey.
Their latest figure for all the gold in the world is 171,300 tonnes – which is almost exactly the same as the amount in our super-villain’s imaginary cube.