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| | Indo-European languages Information Center - indo-european languages chart |
 | | According to the Kurgan hypothesis, early PIE was spoken in the chalcolithic steppe cultures of the 5th millennium BC between the Black Sea and the Volga. |
 | | 4000–3500: The Yamna culture, the prototypical kurgan builders, emerges in the steppe, and the Maykop culture in the northern Caucasus. |
 | | The Yamna culture is at its peak, representing the classical reconstructed Proto-Indo-European society, with stone idols, early two-wheeled proto-chariots, predominantly practicing animal husbandry, but also with permanent settlements and hillforts, subsisting on agriculture and fishing, along rivers. |
| scipeeps.com /Sci-Linguistic_Topics_H_-_M/Indo-European_languages.html (1833 words) |
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