Dr. Richard Alley will present his groundbreaking research on ice cores and Earth’s climate history, offering insight into how scientists understand past climate change and what that history tells us about the present. By studying records preserved deep within glaciers, Dr. Alley explains that while climate has always changed naturally, those changes have had profound impacts on life on Earth. Comparing past shifts in carbon dioxide to today’s conditions shows that current climate change is overwhelmingly driven by human activity, and scientific models accurately reflect the scale of the challenge we face. Dr. Alley, a Penn State professor since 1988, is [...]