According to measurements from NASA’s GRACE satellites going back to 2002, the Greenland and Antarctica ice sheets are losing 427 billion metric tons of ice per year, equivalent to eight Olympic swimming pools per second. That melting—driven by climate change—is the number two driver of global sea level rise, it harms nearby corals and shellfish, and more. Today, we explore how we know the ice sheets are melting, what the consequences are, and where we go from here. With special guest Dr. Robin Bell: Professor of Marine Geology and Geophysics at Columbia University.