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PBS Eons | Something Has Been Making This Mark For 500 Million Years @eons | Uploaded 2 years ago | Updated 3 minutes ago
Paleodictyon, a hexagonal-patterned fossil, is a bit of a mystery. We don’t even know if it’s a trace fossil, or the organism itself. So… what could it be?

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References: docs.google.com/document/d/1V8GGqulrwVW-3axqWm2w3WmWPX3J7U6FChFF2sEIFp4/edit?usp=sharing
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Something Has Been Making This Mark For 500 Million Years @eons

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