How the need for fertiliser consumed Banaba
Twenty thousand men died on the battlefield at Waterloo, and most were buried close to where they fell. Their bodies were piled into mass graves; hastily covered with a layer of earth before the June heat made the task any more unbearable than it already was. But in the 200 years that have since passed, archaeologists have recovered only a single skeleton from this patch of Belgian ground. The rest of the remains have gone. There is no mystery, though; we know where they went. They were taken to England; ground to a fine powder; distributed to farmers and spread across their fields. There was something, those farmers knew, that was missing from their soil. And that something could be replenished with a sprinkling of bone dust.