The Karakoram is a large mountain range spanning the borders of Pakistan, China, and India, and it is part of the greater Himalayan complex. While the Himalayas have more peaks overall, the Karakoram is the most glaciated part of the world outside the polar regions. It is home to K2, the second-highest mountain in the world at 8,611 meters. K2 is often called 'The Savage Mountain' because it is much more difficult and dangerous to climb than Mount Everest; for every four people who reach the summit, one dies. The range also features the Siachen Glacier, one of the longest glaciers in the world outside the poles, which has famously been a site of military conflict. Unlike many other ranges, parts of the Karakoram are actually expanding in mass despite global warming, a phenomenon known as the 'Karakoram Anomaly,' which scientists are still actively studying.