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Greenies Turning Their Greenhouse into a JunkyardBlue holes are as old as the last ice age ... they form as regular sink holes when sea levels are 200 feet lower than today ... when the ice melts and sea levels rise ... the sink holes remain and become blue holes ... just like regular sink holes on land .... blue holes can form quickly ... and both for the same reason ...
Of course they're weird and strange ... there's two in Tennessee that lead straight to the Gates of Hell ... all the scientists that go to see never return ...