Thanks for the link, Jack.

It might have been a temple. It also might have been a throne room or even a courthouse of sorts. Certainly the 16-foot high stones are amazing to contemplate.

I wish I could see the carvings, but the link to photos doesn't seem to do anything.

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11,000 years ago, the glaciers were either still melting or hadn't been gone long. The climate would have been much different. So it ain't necessarily so (as the article claims) that humans are 100% responsible for the aridity of the region today.