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Credit Wikimedia Commons. A trio of new studies, two in Nature and the third in Scienceanalyzed genetic material from scores of ancient humans to create a new map of human movement, as well as the spread of language, the hepatitis B virus and horse domestication, across the sprawling Eurasian steppes. The ancient genomes sequenced for the papers — with more findings to follow, promise the authors — represent the largest collection of ancient human DNA ever studied.

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The Bronze Age came to Europe and Asia years ago, leaving a trail of metal tools, axes, and jewelry that stretches from Siberia to Scandinavia. But was this powerful new technology an idea that spread from the Middle East to European and Asian people, or was it brought in by foreigners? Two of the largest studies of ancient DNA from Bronze Age and Iron Age people have now found that outsiders deserve the credit: Nomadic herders from the steppes of today's Russia and Ukraine brought their culture and, possibly, languages with them—and made a relatively recent and lasting imprint on the genetic makeup of Europeans and Asians.

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Author: Maciamo Hay. Written on 28th January Last updated in February

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A steppe is a dry, grassy plain. Steppes occur in temperate climate s, which lie between the tropics and polar regions. Temperate regions have distinct seasonal temperature changes, with cold winters and warm summers.

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By Bruce Bower. February 8, at am. Those exchanges presumably sparked the geographic spread of metalworking, the wheel and wagon, and Indo-European languages still spoken in much of the world.

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Despite being strategically located at the crossroads of Europe and Asia, Central Asia has long been poorly connected: remote, landlocked, cut off from the main population centres of Europe and Asia by empty steppes and rugged mountains. As well as physical barriers, regulatory obstacles and political repression often inhibit the free flow of people, goods, services and ideas. Uzbekistan's more open foreign policy since also favours improved connectivity.

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The term "steppe" denotes grassland : a low-precipitation region with enough rain for grass, but not enough for trees see Climates and Biomes. The rolling plains of the Steppe are occasionally pierced by mountains ; the most serious of these interruptions divides the region into the western Steppe which lies mainly in Ukraine, Russia, and Kazakhstan and eastern Steppe which lies chiefly in Mongolia and China. The eastern Steppe is drier and colder than its western counterpart; consequently, Steppe peoples historically tended to migrate westward.

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The Eurasian Steppealso called the Great Steppe or the steppesis the vast steppe ecoregion of Eurasia in the temperate grasslands, savannas, and shrublands biome. The Steppe route is a predecessor not only of the Silk Road which developed during antiquity and the Middle Agesbut also of the Eurasian Land Bridge in the modern era. The Eurasian Steppe extends thousands of miles from near the mouth of the Danube almost to the Pacific Ocean.

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The prairie of North America especially the shortgrass and mixed prairie is an example of a steppe, though it is not usually called such. A steppe may be semi-arid or covered with grass or shrubs or both, depending on the season and latitude. The term is also used to denote the climate encountered in regions too dry to support a forest but not dry enough to be a desert. The soil is typically of chernozem type.

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