Re: Wheels.

Apologies for double posting my last post.

Just regarding wheels. Wheel made pottery (Ubaid again) appears
before wheel transport. Inventions tend to work together in
clusters. The 4 wheeled solid wheeled chariots of Sumer are as early
as wheels elsewhere. The Times Archaeological Atlas of the World
states that the first ox-drawn wheeled vehicles, with solid wheels
made from three piece planks come from Southern Mesolpotamia. It
also states that wheeled vehicles in graves appear in the Steppes
3,600 BCE, a little later. What is the evidence for supposing wheels
were not a Ubaidian-Sumerian invention?

Regards

John