Ice core analysis is a scientific method used to study the Earth's past climate by examining layers of ice drilled from glaciers and ice sheets. Each layer of ice contains trapped air bubbles, dust, and other particles that provide valuable information about atmospheric conditions over thousands of years. By analyzing these layers, researchers can reconstruct historical climate data, including temperature and greenhouse gas concentrations. The process involves extracting long cylinders of ice, known as ice cores, from locations like Greenland and Antarctica. Scientists then analyze the chemical composition and physical properties of the ice to understand changes in climate, volcanic activity, and even human impact on the environment throughout history.