China just unveiled the results of its first census in over a decade. The results are striking, if not surprising: the world’s largest country will soon stop growing. Yet if a greying population causes economic headwinds, Chinese officials also have reason for cheer. With digital currencies in vogue, central banks want to get in on the action. The rise of “govcoins” could transform monetary policy and expand access to bank accounts. But it could also destabilise private banking. And roadkill isn’t just an unsightly nuisance. It also offers a way of counting elusive species.

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