OSC Plenary Lectures Weyprecht Lecture: John E. Carlstrom, Dept of Astronomy and Astrophysics University of Chicago, USA: "Antarctic Astronomy" Antarctic Science Lecture: Steven Rintoul, Australian CSIRO, Hobart: "The Global Influence of the Southern Ocean" ACCE Lecture: John Turner, British Antarctic Survey, UK: "Antarctic Climate Change and the Environment (ACCE)" Science lecture: Eduardo Olivero, CADIC-CONICET, Argentina: "Upper Cretaceous Marine Paleoenvironmental Changes in the James Ross Basin, Antarctica, and their Corresponding Fossil Record: Biogeographic And Paleoceanographic Implications"