The Proto-Indo-Europeans in this sense likely lived during the Copper Age , or roughly the 5th to 4th millennia BC .
The Proto-Indo-Europeans likely lived during the Copper Age , or roughly the 5th to 4th millennia BC .
The Proto-Indo-Europeans likely lived during the Copper Age , or roughly the 5th to 4th millennia BC .
Haz la oración simple: The Proto-Indo-Europeans in this sense likely lived during the Copper Age , or roughly the 5th to 4th millennia BC . Producción: