Rob Dunbar discusses climate change and three issues that affect the oceans: sea level rise, ocean warming and ocean acidification. Dunbar looks deeply at ancient corals and sediments to study how the climate and the oceans have shifted over the past 50 to 12,000 years and how the Antarctic ecosystem is changing right now. The talk provides information about how the research data was gathered and how the conclusions were made. The information is presented in simple language appropriate for high school students.