Antarctica is the southernmost continent, covered 98% by ice and snow, and remains below freezing year-round. It contains the largest ice sheet on Earth at 1.2 million square miles and its tallest mountain, Mount Vinson, stands at 4,892 meters. While no countries own Antarctica, increasing ice melt could raise water levels globally by 60 meters and flood coastal areas by displacing Antarctic wildlife and eliminating their sea ice habitat.