Proto-Indo-EuropeansThe Proto-Indo-Europeans are a hypothetical prehistoric population of Eurasia who spoke Proto-Indo-European (PIE), the ancestor of the Indo-European languages according to linguistic reconstruction. Knowledge of them comes chiefly from that linguistic reconstruction, along with material evidence from archaeology and archaeogenetics. The Proto-Indo-Europeans likely lived during the late Neolithic, or roughly the 4th millennium BC. Mainstream scholarship places them in the Pontic–Caspian steppe zone in Eurasia (present-day Ukraine and southern Russia).
Eurasian nomadsThe Eurasian nomads were a large group of nomadic peoples from the Eurasian Steppe, who often appear in history as invaders of Europe, West Asia, Central Asia, East Asia, and South Asia. A nomad is a member of people having no permanent abode, who travel from place to place to find fresh pasture for their livestock. The generic title encompasses the varied ethnic groups who have at times inhabited the steppes of Central Asia, Mongolia and what is now Russia and Ukraine.
Domestication of the horseHow and when horses became domesticated has been disputed. Although horses appeared in Paleolithic cave art as early as 30,000 BCE, these were wild horses and were probably hunted for meat. The clearest evidence of early use of the horse as a means of transport is from chariot burials dated c. 2000 BCE. However, an increasing amount of evidence began to support the hypothesis that horses were domesticated in the Eurasian Steppes in approximately 3500 BCE.
ChariotA chariot is a type of cart driven by a charioteer, usually using horses to provide rapid motive power. The oldest known chariots have been found in burials of the Sintashta culture in modern-day Chelyabinsk Oblast, Russia, dated to c. 1950–1880 BCE and are depicted on cylinder seals from Central Anatolia in Kültepe dated to c. 1900 BCE. The critical invention that allowed the construction of light, horse-drawn chariots was the spoked wheel.
Pontic–Caspian steppeThe Pontic–Caspian steppe, formed by the Caspian steppe and the Pontic steppe, is the steppeland stretching from the northern shores of the Black Sea (the Pontus Euxinus of antiquity) to the northern area around the Caspian Sea. It extends from Dobruja in the northeastern corner of Bulgaria and southeastern Romania, through Moldova and southern and eastern Ukraine, across the Russian Northern Caucasus, the Southern and lower Volga regions to western Kazakhstan, adjacent to the Kazakh steppe to the east, both forming part of the larger Eurasian Steppe.
Tree modelIn historical linguistics, the tree model (also Stammbaum, genetic, or cladistic model) is a model of the evolution of languages analogous to the concept of a family tree, particularly a phylogenetic tree in the biological evolution of species. As with species, each language is assumed to have evolved from a single parent or "mother" language, with languages that share a common ancestor belonging to the same language family.
Eurasian SteppeThe Eurasian Steppe, also simply called the Great Steppe or the steppes, is the vast steppe ecoregion of Eurasia in the temperate grasslands, savannas and shrublands biome. It stretches through Hungary, Bulgaria, Romania, Moldova, Ukraine, western Russia, Siberia, Kazakhstan, Xinjiang, Mongolia and Manchuria, with one major exclave, the Pannonian steppe, located mostly in Hungary. Since the Paleolithic age, the Steppe Route has connected Central Europe, Eastern Europe, Western Asia, Central Asia, East Asia and South Asia economically, politically and culturally through overland trade routes.
