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 generally defined as comprising the eastern four-fifths of Eurasia. It is located to the east of the Suez Canal and the Ural Mountains, and south of the Caucasus Mountains 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. Asia differs very widely among and within its regions with regard to ethnic groups, cultures, environments, economics, historical ties and government systems. Area: about 49 700,000 km2 (19 189 277 mi2) it covers about 60 percent of Earth's total land area.
Population: more than 4 billion human inhabitants (4,157 million), about 60 percent of the world's population. 1, 33 billion of these people live in China. Seven out of ten of the most populated countries are in Asia (2010).Highest Point: Mount Everest 8848m (29 028 ft) Nepal. Largest Lake: Caspian Sea (salt lake) 371 000 km2 (143 250 mi2),
Zero Baykal, Lake Baikal 31 500 km2 in Siberia is the world's largest freshwater lake by volume.
Longest River: Yangtze China, 6380 km
BOUNDARY the land mass of Asia is not the sum of the land masses of each of its regions, which have been defined independently of the whole. For example, the borders of Central Asia and the Middle East depend on who is defining them and for what purpose. These varying definitions are not generally reflected in the map of Asia as a whole; for example, Egypt is typically included in the Middle East, but not in Asia, even though the Middle East is a division of Asia. The demarcation between Asia and Africa is the isthmus of Suez and the Red Sea. The border with Europe