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259 | Adam Frank on What Aliens Might Be Like
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
Civilization Erased by Time
The speaker suggests a civilization as large as the current one could have existed a hundred million years ago, but it would have been erased over time. The earth's surface undergoes significant restructuring over millions of years, with most traces disappearing after 10 million years due to subduction and other geological processes. Fossils are also unreliable due to the incompleteness of the fossil record.
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