Topics include his childhood and early education; World War II experiences; decision to take up geology; availability of Western publications at Humboldt University; fixism and alternative ideas to plate tectonics; the International Geophysical Year and East German participation; National Oil company job; accused of being a Western spy; escape to West Germany and refuge camp experience; his work with the German Geological Survey; research on the North Sea; Indian Ocean Expedition and its importance to German marine science; trip to U.S. to meet American colleagues; differences between German and US marine sciences; recollections of Maurice Ewing; comparison of Scripps, Lamont, Woods Hole; participation on Atlantic Panel; MOHOLE Project; Joint Institute Deep Earth Sampling Program; German science policy; international cooperation in science; work on the Argentine volcanic margins; cooperation with Russian researchers; government scientific advising.