- 400 Mysterious Ancient Stone Structures Discovered in Saudi Arabia - The gates "are stone-built, the walls roughly made & low." They "appear to be the oldest man-made structures in the landscape." Most were discovered through satellite surveys & no fieldwork has been done. https://www.livescience.com/60698-mysterious-stone-structures-discovered-saudi-arabia.html 82 comments worldnews
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- Massive stone structures in Saudi Arabia may be some of oldest monuments in the world | Live Science https://www.livescience.com/mysterious-stone-structures-saudi-arabia-oldest.html 37 comments
- Hundreds of Mysterious Stone Structures Discovered in Western Sahara | Live Science https://www.livescience.com/64677-stone-structures-discovered-western-sahara.html 0 comments
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