Chronology of Metal Ages

The Yarmnea invasion predates the arrival of Zebu cattle in the fertile crescent by about three or four centuries. Sorab Badoria: Most likely these are events that are not connected to each other. In the Rig Veda, there is mention of Iron. So if people were using iron, our ancestors were using iron during the Rig V Vedic Age which pushes back the Iron Age way before what is conventionally understood to be the Iron Age. It's a very over-simplistic model of the progress of human history and human evolution and all that. And then we have to ask ourselves as to when was the Rig Veda written.