Q1665Alfred Wegener noticed that Africa and South America fit together like torn paper, and proposed in 1912 that the continents drift. Geologists ridiculed him. He was proved right decades after he died on the ice.
His evidence was good — matching coastlines, matching rock formations, identical fossils on shores now separated by an ocean. His weakness was that he could not explain what force could shove a continent. That gap let the field dismiss him, sometimes savagely; one geologist called it delirious ravings. Wegener died at fifty on a Greenland expedition, still unaccepted. In the 1960s, mapping of the sea floor revealed plates spreading apart, and the mechanism appeared. Plate tectonics is now the organising idea of the earth sciences.







