I was walking through the woods one day when I happened on a large, flat rock near the base of an old ash tree. Conditioned as I am from such rambles with my daughter, whose interest in wildlife echoes that of my own childhood, I bent down and lifted one end of the rock, hoping to catch a glimpse of some exotic creature or another: perhaps a delicate ring-necked snake, or a plasticky-looking red eft. The rock came loose without too much effort and teetered on its broadest edge, but before I could let it flip to one side, I recoiled in horror: There, amid the millipedes and ant larvae, was a cluster of teeny-tiny, nasty-looking old men, writhing in such a tangle that I couldn't even count them. They were bespectacled, to a one, and mostly baldI could tell quite easily, despite the berets worn by some of themand each pair of feet was shod in a teeny-tiny pair of off-brand Birkenstock copies, with thin, shiny black socks underneath.