Driverless cars: Who should die in a crash?

If forced to choose, who should a self-driving car kill in an unavoidable crash? Should the passengers in the vehicle be sacrificed to save pedestrians? Or should a pedestrian be killed to save a family of four in the vehicle? To get closer to an answer - if that were ever possible - researchers from the MIT Media Lab have analysed more than 40 million responses to an experiment they launched in 2014. Their Moral Machine has revealed how attitudes differ across the world.