What if a super-villain took control of the world’s gold and melted it into a cube?
BBC World Service
Ruth Alexander speaks to Kenneth Cukier about how data can be used.
Last week the US Speaker said that there were more black men in prison than in college.
With the news that a baby has been ‘cured’ of HIV we look at the numbers.
Do Kenyans vote along ethnic lines? More Or Less investigates.