I noticed at the news desk an item about ancient monumental stone structures in the NW Saudi Arabia deserts that predated the pyramids (5000B.C.). One of the images that caught my eye was a rather large stone structure in the shape of a "key hole". On a recent "Ancient Aliens" episode "Key Hole" formations were featured, so here we have one that existed in 5000 B.C. or before. Thoughts?
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