Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area (or 30% of its land area) and with approximately 3.9 billion people, it hosts 60% of the world's current human population. During the 20th century Asia's population nearly quadrupled. Asia is defined according to similar definitions presented by the Encyclopaedia Britannica and the National Geographic Society as 4/5 of the landmass of Eurasia with the western portion of the latter occupied by Europe located to the east of the Suez Canal, east of the Ural Mountains and south of the Caucasus Mountains (or the Kuma-Manych Depression) and the Caspian and Black Seas. It is bounded on the east by the Pacific Ocean, on the south by the Indian Ocean and on the north by the Arctic Ocean. It contains one country in the Mediterranean Sea - Cyprus.
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