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Aha, a reply at last!
Hmmm,yes,some good comments there Therema.
Nice to know you by the way.I've never seen you on AB before.
It does make you wonder how they built these marvellous buildings and structures.They only had basic tools in those days.I could well be wrong,but they could have somehow had help from another race of people who had better equipment and with more intelligence, or as what we probably think nowadays, that they just had many many slaves to do their heavy work for them.
As you say,it's still a mystery to this day.