Glacial ice and debris form incredible patterns around the edges of the Malaspina Glacier in southeastern Alaska. Located at the head of the Alaska Panhandle, the glacier is roughly 40 miles (65 km) wide and 28 miles (40 km) long, covering an area of about 1,500 square miles (3,900 square km). Decades of aerial photographs and radar data have shown that the Malaspina Glacier lost about 66 feet (20 m) of thickness between 1980 and 2000 — enough shrinkage to contribute 0.5% of the rise in global sea level.