Dionysis Foustoukos is an experimental geochemist studying the evolution of geofluids in a wide range of natural environments. His research activities focus mainly on the evolution of submarine volcanoes; the habitability of deep-sea extreme environments; and the geochemical interactions between Earth’s upper mantle, crust and oceans. Research projects involve collaborations with petrologists, mantle geochemists, stable isotope geochemists and microbiologists. He develops novel experimental designs to investigate natural processes under controlled laboratory conditions, and he has been involved in oceanographic expeditions at the Pacific Ocean and the Mediterranean Sea.