Asia is the largest part of the world in terms of area (about 43.4 million km²) and population, located in the Eastern Hemisphere (with a few exceptions). Together with Europe, it forms the Eurasia continent. The area of Asia is 8.7% of the total surface area of the Earth (or 30% of the landmass), the population is about 4.1 billion (as of 2010), which is 60% of the Earth's population. In the 20th century, the population of Asia increased almost four times. According to the Encyclopedia Britannica and the National Geographic Society, Asia occupies 4/5 of the landmass of Eurasia (the western part is occupied by Europe) and is located east of the Suez Canal, the Aegean, Black and Caspian seas, rivers The Urals (according to another version, the Emba River) and the Ural Mountains and to the south of the Caucasus Mountains (or the Kumo-Manytsk Depression), as well as the Caspian and Black Seas.
Most likely, the name of the continent comes from the ancient Assyrian word asu - east. You can compare: Oz (mythical country), ost, Assyria, Asshur, Aysor.
Over time, the traditional geographical concept of Asia changed significantly in its scope and content. The very concept arose in the ancient era, when continuous natural borders in the form of the Mediterranean, Aegean and Marmara seas led the Phoenicians and Greeks to contrast the countries of the West (Erebus) and the East (Asu). Over time, the name Asia spread to the south - to the Arabian Peninsula and to the north - to the Caucasus and the Scythian steppes. Throughout the Middle Ages, the eastern border of Europe was increasingly pushed eastward — at first the border was the Dniester, then the Dnieper and the Don. At the end of the 18th century, Peter-Simon Pallas suggested drawing the border along the Ural Mountains, General Sirte and Ergeny. In the 19th century, they began to consider the watershed of the Ural Mountains as a border. The question of the border between Europe and Asia in the Caucasus caused many disputes at the time. There are two versions: along the Kumo-Manytsia depression or along the mountain range of the Great Caucasus (according to some data, even further south, along the Kura and Araks rivers).
Asia is separated from North America by the Bering Strait, from Africa by the Suez Canal and the Red Sea, from Europe by the Dardanelles Strait, the Sea of Marmara, the Bosphorus Strait, and the Black Sea; the conditional continental border with Europe runs along the coast of the Caspian Sea, �