The Stone Age is not over! Whether nestled in a dark corner of the gall bladder or hurtling toward us at fearsome speeds from the Kuyper Belt, whether yielding to the sculptor's delicate chisel or used to decorate the human body, stones continue be an integral part of sociopolitical economies. Cabinet 53, with a special section on "Stones," features an interview with Robert Proctor on the establishment in the nineteenth century of the now-familiar...