What is amazing to me is that they were able to do this so long ago, just barely after coming out of the hunter/gatherer stage of things (about 1000 years earlier??). Although I suppose with the growing of crops, the knowledge of seasons and time became much more important to them.
BTW - all of this development (agriculture, communities, large structures, etc.) was possible due to Global Warming.
We know precious little of the age and their capabilities. I believe the research in this thread here is original. 9100 BC appears to herald the first rising of Sirius in more than 800 years over this particular area. The Long Year appears to be well understood by the Egyptians and Babylonians after so it does not seem to be a coincidence that this temple was built to herald the occasion.