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    Etymology

    Main article: Etymology of Iran
    See also: Iran naming dispute

    The term Iran (ایران) in modern Persian derives from the Proto-Iranian term Aryānām first attested in Zoroastrianism's Avesta tradition.[19] Ariya- and Airiia- are also attested as an ethnic designator in Achaemenid inscriptions. The term Ērān, from Middle Persian Ērān (written as ʼyrʼn) is found on the inscription that accompanies the investiture relief of Ardashir I at Naqsh-e Rustam.[20] In this inscription, the king's appellation in Middle Persian contains the term ērān (Pahlavi ʼryʼn), while in the Parthian language inscription that accompanies it, the term aryān describes Iran. In Ardashir's time, ērān retained this meaning, denoting the people rather than the state.

    Notwithstanding this inscriptional use of ērān to refer to the Iranian peoples, the use of ērān to refer to the geographical empire is also attested in the early Sassanid period. An inscription relating to Shapur I, Ardashir's son and immediate successor, includes regions which were not inhabited primarily by Iranians in Ērān regions, such as Armenia and the Caucasus."[21] In Kartir's inscriptions the high priest includes the same regions in his list of provinces of the antonymic Anērān.[21] Both ērān and aryān comes from the Proto-Iranian term Aryānām, (Land) of the (Iranian) Aryas. The word and concept of Airyanem Vaejah is present in the name of the country Iran (Lit. Land of the Aryans) inasmuch as Iran (Ērān) is the modern Persian form of the word Aryānā.

    In the outside world, the official name of Iran from the 6th century BC until 1935 was Persia or similar foreign language translations (La Perse, Das Persien, Perzie, etc.). In that year, Reza Shah asked the international community to call the country by the name "Iran". A few years later, some Persian scholars protested to the government that changing the name had separated the country from its past, so in 1959 Mohammad Reza Shah announced that both terms could officially be used interchangeably. Now both terms are common, but "Iran" is used mostly in the modern political context and "Persia" in a cultural and historical context. Since the Iranian Revolution of 1979, the official name of the country has been the "Islamic Republic of Iran."

    Geography and climate

    Main article: Geography of Iran
    See also: Agriculture in Iran and Wildlife of Iran
    Satellite image of Iran
    Satellite image of Iran
    Mount Damavand, Iran's highest point located in Mazanderan.
    Mount Damavand, Iran's highest point located in Mazanderan.

    Iran is the eighteenth largest country in the world after Libya and before Mongolia.[22] Its area roughly equals that of the United Kingdom, France, Spain, and Germany combined, or slightly less than the state of Alaska.[23][24] Its borders are with Azerbaijan (432 km/268 mi) and Armenia (35 km/22 mi) to the north-west; the Caspian Sea to the north; Turkmenistan (992 km/616 mi) to the north-east; Pakistan (909 km/565 mi) and Afghanistan (936 km/582 mi) to the east; Turkey (499 km/310 mi) and Iraq (1,458 km/906 mi) to the west; and finally the waters of the Persian Gulf and the Gulf of Oman to the south. Iran's area is 1,648,000 km² (approximately 636,300 sq mi).[25]

    Iran consists of the Iranian Plateau with the exception of the coasts of the Caspian Sea and Khuzestan. It is one of the world's most mountainous countries, its landscape dominated by rugged mountain ranges that separate various basins or plateaux from one another. The populous western part is the most mountainous, with ranges such as the Caucasus, Zagros and Alborz Mountains; the latter contains Iran's highest point, Mount Damavand at 5,604 m (18,386 ft), which is not only the country's highest peak but also the highest mountain on the Eurasian landmass west of the Hindu Kush.[26] The Northern part of Iran is covered by dense rain forests called Shomal or the Jungles of Iran. The eastern part consists mostly of desert basins such as the Dasht-e Kavir, Iran's largest desert, in the north-central portion of the country, and the Dasht-e Lut, in the east, as well as some salt lakes. This is because the mountain ranges are too high for rain clouds to reach these regions. The only large plains are found along the coast of the Caspian Sea and at the northern end of the Persian Gulf, where Iran borders the mouth of the Shatt al-Arab (or the Arvand Rūd) river. Smaller, discontinuous plains are found along the remaining coast of the Persian Gulf, the Strait of Hormuz and the Sea of Oman.

    Iran's climate ranges from arid or semiarid, to subtropical along the Caspian coast and the northern forests. On the northern edge of the country (the Caspian coastal plain) temperatures nearly fall below freezing and it remains humid for the rest of the year. Summer temperatures rarely exceed 29 °C (85 °F).[27][28] Annual precipitation is 680 mm (27 in) in the eastern part of the plain and more than 1,700 mm (67 in) in the western part. To the west, settlements in the Zagros basin experience lower temperatures, severe winters with below zero average daily temperatures and heavy snowfall. The eastern and central basins are arid, with less than 200 mm (eight in) of rain, and have occasional deserts.[28] Average summer temperatures exceed 38 °C (100 °F). The coastal plains of the Persian Gulf and Gulf of Oman in southern Iran have mild winters, and very humid and hot summers. The annual precipitation ranges from 135 to 355 mm (five to fourteen inches).[28]

    Iran's wildlife is composed of several animal species including bears, gazelles, wild pigs, wolves, jackals, panthers, Eurasian lynx, and foxes. Other domestic animals include, sheep, goats, cattle, horses, water buffalo, donkeys, and camels. The pheasant, partridge, stork, eagles and falcon are also native to Iran.

    Provinces and Cities

    See also: List of Iran cities by population
    After the revolution, Shahyad Tower was renamed Freedom Tower
    After the revolution, Shahyad Tower was renamed Freedom Tower

    Template:Provinces of Iran Labeled Map Iran is divided into thirty provinces (ostān), each governed by an appointed governor (استاندار, ostāndār). The provinces are divided into counties (shahrestān), and subdivided into districts (bakhsh) and sub-districts (dehestān).

    Iran has one of the highest urban-growth rates in the world. From 1950 to 2002 the urban proportion of the population increased from 27% to 60%.[29] The United Nations predicts that by 2030 80% of the population will be urban.[30] Most internal migrants have settled near the cities of Tehran, Isfahan, Ahvaz, and Qom. The listed populations are from the 2006/07 (1385 AP) census.[31] Tehran, with population of 7,705,036, is the largest city in Iran and is the Capital city. Tehran is home to around 11% of Iran's population. Tehran, like many big cities, suffers from severe air pollution. It is the hub of the country's communication and transport network.

    Mashhad with a population of 2.8 million is the second largest Iranian city and the centre of the province of Razavi Khorasan. Mashahd is one of the holiest Shi'a cities in the world as it is the site of the Imam Reza shrine. It is the centre of tourism in Iran and between 15 and 20 million pilgrims go to the Imam Reza's shrine every year.[32][33] Another major Iranian city is Isfahan (population 1,986,542). Isfahan is the capital of Isfahan Province. The Naghsh-e Jahan Square in Isfahan has been designated by UNESCO as a World Heritage Site. The city contains a wide variety of Islamic architectural sites ranging from the eleventh to the 19th century. The growth of suburb area around the city has turned Isfahan to the second most populous metropolitan area (3,430,353).[34] The other major Iranian cities are Karaj (population 1,732,275), Tabriz (population 1,597,312) and Shiraz (population 1,227,331). Karaj is located in Tehran province and is situated 20 km west of Tehran, at the foot of Alborz mountains, however the city is increasingly becoming an extension of the metropolitan Tehran.

    History

    Early history (3200 BC–625 BC)

    19th century reconstruction of a map of the world by Eratosthenes, c.200 BC. The name Ariana (Aryânâ) was used to describe the region where the Iranian Plateau is found.
    19th century reconstruction of a map of the world by Eratosthenes, c.200 BC. The name Ariana (Aryânâ) was used to describe the region where the Iranian Plateau is found.

    Dozens of pre-historic sites across the Iranian plateau point to the existence of ancient cultures and urban settlements in the fourth millennium BC,[10][11][12] centuries before the earliest civilizations arose in nearby Mesopotamia.[35] Proto-Iranians first emerged following the separation of Indo-Iranians, and are traced to the Bactria-Margiana Archaeological Complex.[36] Aryan, (Proto-Iranian) tribes arrived in the Iranian plateau in the third and second millennium BC, probably in more than one wave of emigration, and settled as nomads. Further separation of Proto-Iranians into "Eastern" and "Western" groups occurred due to migration. By the first millennium BC, Medes, Persians, Bactrians and Parthians populated the western part, while Cimmerians, Sarmatians and Alans populated the steppes north of the Black Sea. Other tribes began to settle on the eastern edge, as far as on the mountainous frontier of north-western Indian subcontinent and into the area which is now Balochistan. Others, such as the Scythian tribes spread as far west as the Balkans and as far east as Xinjiang. Avestan is an eastern Old Iranian language that was used to compose the sacred hymns and canon of the Zoroastrian Avesta in c. 1000 BC.