Researchers have found a 4,000-year-old fortification defending an oasis in the North Arabian Desert, at the ancient Khaybar Oasis. It is officially one of the longest known structures - 14.5 kilometers (9 mi), dated to the 4th and 3rd millennia BC. What is left of the rampart’s remains have been dated to between 2250 and 1950 BC, at a time when sedentary populations inhabited the area and oases were common. New Study Reveals Ancient Arabian Peninsula Funerary Avenues Network Footprints Reveal Passage of Early Humans From Africa Through Arabia Human Habitation in Northwest Arabia and Nomad Pastoralist Groups Archaeologists from the CNRS and the Royal Commission for AlUla (RCU) have stated that this discovery, alongside the Tayma Oasis, marks one
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