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New clues revive the question: was there an advanced civilization before us?

Across deserts, jungles, and polar ice, new discoveries are quietly stretching the story of civilization further back in time ...
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A Provocative Theory by NASA Scientists Asks: What If We Weren’t the First Advanced Civilization on Earth?

In the grand sweep of Earth’s four-billion-year history, 300 years is barely a blink. And yet, that blink — our industrial era — has already reshaped the atmosphere, oceans, and sediments. If ...