THE ORIGIN OF SPECIES A little random flick of DNA, a chance mutation, taking hold, admits that slight advantage - and a species splits. The faster big cat hurtles on its way towards the juiciest, slow-.moving prey. The fittest will survive, the one that fits its niche the best, fights on and never quits or takes a careless, lounging holiday. I know that's how it is, and was, but I wonder sometimes about that jewelled watch, that fish's eye, this new black jaguar's paw, the flashing mystery of the damselfly. I turn the winder backwards, notch by notch and find a clock-maker- above the law.