Asia is one of the seven continents of Earth, covering 30% of Earth's land area and 8.7% of Earth's total surface area. Asia is located as far west as the Bosphorus and the Suez Canal in the south and the Urals in the north, and it extends eastward towards the Pacific Ocean and Indonesia. The continent has a population of 4,164,252,000, over half of the world's population, with India and China being the two most populous nations in the world. Asia has a wide variety of cultures, with Islamic cultures in the Middle East, Indian culture in the Indian Subcontinent, and East Asian culture in the east.