Massive stone structures in Saudi Arabia may be some of oldest monuments in the world – Live Science

They number in the hundreds, can be larger than an NFL football field and are found across Saudi Arabia, including on the slope of a volcano. Sprawling stone structures reported in 2017
now appear to be some of the oldest monuments in the world, dating back some 7,000 years, archaeologists now report. 
A new study of the mysterious stone structures once called “gates” but now referred to as “mustatils,” the Arabic word for “rectangle” suggests they were used for rituals; and radiocarbon datin…

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