Colin Devey is Professor of Oceanic Volcanism at GEOMAR in Kiel, Germany. His research centres on the fluxes of heat and materials from the Earth´s interior to the seafloor, trying to understand how the oceanic crust and ocean water interact over geological time. His present focus is on finding ways to map large areas of the seafloor to make useful geological maps relevant for global mass balances, mineral prospection, marine protection and spatial planning.