the Atlantic Ocean are the strongest evidence for continental drift. Yet Lowman points out that when the east coast of North and South America is fitted together with the west coast of Eurasia and Africa, there is no room for a large chunk of southern Mexico. Similarly, the Arctic Ocean coastlines of Canada and the Soviet Union should mesh, but do not. And if all the continents have been moving away from one another, the Earth should have ex- panded over the last few hundred million years. In fact,...