This symposium, held in Argentina in March 2003, commemorates Otto Nordenskjöld’s 1901 expedition, and pays tribute to the Swedish and Argentinian explorers who took on the challenge of early fieldwork in Patagonia and Antarctica. This theme is extended to include recent fieldwork in the natural sciences in the Archipelago of Tierra del Fuego, the Antarctic Peninsula and the sub-Antarctic seas, and celebrates the fruitfulness of continuing Swedish-Argentinian scientific cooperation. The symposium and associated activities took place in the cities of Buenos Aires, La Plata and Ushuaia (Tierra del Fuego), and this book includes a selection of the most significant contributions presented at the meeting.