“88 Cores” is a film by Peggy Weil that shows two miles of ice from Greenland’s ice sheet in one continuous pan. The time span of the ice is 110,000, meaning that the oldest ice in the film is from 2 miles below the top of the ice sheet and is 110,000 years old. Glaciologists use ice cores from Greenland’s ice sheet to help understand the composition of Earth’s atmosphere in the past. Tiny bits of air are trapped in the ice, containing information about the concentration of CO2 in the atmosphere from many years ago. We compare that to CO2 in the atmosphere now, and study the effects that increase in CO2 is having on our climate.