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Carroll County Observer
carrollcountyobserver.com > 08/23/2026 > 1800-miles-beneath-our-feet-structures-taller-than-mount-everest-are-still-puzzling-geologists

1,800 miles beneath our feet structures taller than Mount Everest are still puzzling geologists

3+ week, 1+ day ago   (570+ words) Earthquake waves arrive at scientific instruments carrying traces of places no drill could ever reach. Near the bottom of the mantle, those signals change in ways that reveal two immense, irregular regions sitting above the planet’s outer core. Their scale…...