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#13 Antarctica
Antarctica is the coldest, driest, windiest continent on the planet and its average height is the largest. Although 98% of Antarctica is covered with ice, practically the whole area is a desert (the largest on Earth) with very little rainfall. Antarctica is cooler than the Arctic since most of the continent is more than 3 km above sea level and since the Arctic Ocean covers the northern polar zone, giving the relative warmth of the ocean to the icebergs. Antarctica has penguins, blue whales, dolphins and seals.