Ubar / Iram of the Pillars — NASA found it and then everyone got quiet

This one still irritates me. 1992, NASA Shuttle Imaging Radar picks up buried caravan routes converging on a single point under the Rub al-Khali. They excavate. They find a city that collapsed into a limestone cavern — the whole thing just swallowed. Frankincense trading hub, maybe 5000 years of occ……