Lava tube in Saudi Arabia sheltered humans for thousands of

A mile-long lava tube in Saudi Arabia was full of life, as new archaeological research shows.

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Harrat Khaybar , Saudi Arabia General , Saudi Arabia , Australia , Umm Jirsan , Mathew Stewart , Griffith University , Smithsonian Institution Global Volcanism Program , Smithsonian Institution , Global Volcanism Program , Green Arabia , Bronze Age ,