I am particularly interested in the geomorphology of the oceanfloor. If one was to drain the oceans, then a seascape would emerge that hosts the highest peaks, the longest mountain ranges and the largest plains on our planet. Perhaps, surprisingly the ocean floor is also covered by a network of channels that strongly resemble river channels. Hundreds of kilometres long stretches of meandering channels can be traced back to canyon that are wider and deeper than any we know on land. But how do these ocean-floor rivers work? How often are these rivers active? How do these rivers contribute to sedimentary and geochemical cycles that underpin the working of our planet? Many of these rather basic questions remain unanswered. Yet, with the fast development of technology we are now living in an exciting time where such questions are becoming answerable.