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Extensive Desert 'Lava Tubes' Sheltered Humans for 7,000 Years, Archaeologists Find

www.smithsonianmag.com Extensive Desert 'Lava Tubes' Sheltered Humans for 7,000 Years, Archaeologists Find

Formed after volcanic activity, the underground caves periodically hosted early humans and their livestock in Saudi Arabia, facilitating cultural exchange

Extensive Desert 'Lava Tubes' Sheltered Humans for 7,000 Years, Archaeologists Find
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