Fossils, too, are telling evidence for shared descent, but evolution does not need them to make its case, for we can see it happening before our eyes. I was fascinated to learn that, in 1971, Belgian scientists transferred a group of lizards from one small island off the Yugoslav coast to another, free of native members of that species, nearby. During that same summer, a few miles inland in the wild backwoods of Croatia, I myself was hard at work moving thousands of snails between habitats in the hope of picking up differences in survival. Thirty-seven years later, the descendants of the transferred lizards had changed – evolved – to gain stronger jaws and a modified gut to deal with their new and more vegetarian diet; but, alas, just a year after moving the molluscs I could find almost none of them (which proves not that evolution is wrong but that experiments in the wild usually do not work).