The 13th element

It was discovered by alchemists, prescribed by apothecaries, exploited by the industrialists of the nineteenth century, and abused by the combatants of the twentieth century. It can be found in many things that have improved our everyday life, from toothpaste to detergents to food additives. For more than 300 years, phosphorus--one of nature's deadliest creations--has continued to fascinate us with the many surprising roles it has played in human history. From murders-by-phosphorus where the bodies glowed green to the match-factory strike that helped end child labor in England, to the irony…