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The Ocean’s Mysterious Blue Holes Are Massive, Incredibly Deep, And Hiding Secrets We Barely Know Anything About | Collector
The Ocean’s Mysterious Blue Holes Are Massive, Incredibly Deep, And Hiding Secrets We Barely Know Anything About
IFLScience

The Ocean’s Mysterious Blue Holes Are Massive, Incredibly Deep, And Hiding Secrets We Barely Know Anything About

Blue holes may be a lighter hue than black holes, but they're similarly mysterious.

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