Are There Lost Alien Civilizations in Our Past?
A video on YouTube. In Explainers, a Krater category.
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This video explores whether ancient industrial or hunter-gatherer alien civilizations could have existed on Earth, examining what traces they would leave in the geological and fossil records.
From the video
Answers: Could ancient alien civilizations have existed on Earth before humans?
- alien civilizations on Earth
- geological record and Anthropocene
- hunter-gatherer societies and artifacts
- agricultural and empire alien societies
- industrial civilization fossil footprints
What it concludes
- Hunter-gatherer alien civilizations would leave very few artifacts and fossils, making them virtually undetectable in the geological record.
- Agricultural and empire alien civilizations would leave more sophisticated tools, architecture, and fossils, but these would still likely vanish after millions of years.
- Industrial alien civilizations would leave massive, distinct scars on the geological record, such as altered isotope ratios, plastics, radioactive elements, and mass extinctions.
- The lack of any traces of ancient industrial civilizations in the geological record indicates that no such civilizations existed in Earth's deep past.
- Sustainable industrial civilizations might leave tiny, easily overlooked geological imprints, making them hard to detect over hundreds of millions of years.
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