Geographer. Eötvös University, Budapest, Hungary, Department of Physical Geography, Head of Center of Geography, Professor (associate). Editor in chief of the popular-science Földgömb magazine. Scientific field: periglacial and glacial geomorphology, effects of past and present climate changes on cryosphere, hydrography and surface evolution. Field works in extreme environments, in arid high mountains, cold alpine and polar tundras (e.g.3x Antarctica).