Asia is a vast region, not having an exit to the sea. In spite of some vagueness of its borders, there are some common characteristics of this region - historically Central Asia was always associated with its nomadic peoples and the Great Silk road. Central Asia was a centre of peoples, goods and ideas from different parts of Eurasian continent – Europe, Mead east, Southern and Eastern Asia.
Central Asia was firstly pointed as a separate region of the world by a Geographer Alexander Humboldt in 1843.
The total history of Central Asia, prepared by UNESCO, is based on its climate peculiarities including Mongolia, Western China, Punjab, Northern India and Northern Pakistan, north-eastern Iran, Afghanistan, Uzbekistan, Tajikistan, Kyrgyzstan and Turkmenistan.
There is also another method explaining the borders of Central Asia, proceeding from its ethnical population. It includes Sianzan, Turkic regions of South Siberia and five Asian republics.