On the morning of September 19, 2017, around 11:20, a diver in Lake Jackson, Florida, fed a hose approximately 6.7 meters down to the throat of a lake-bottom sinkhole known as Porter Hole Sink and, over about six and a half minutes, injected 45.4 kilograms of 20 percent Rhodamine WT into the hole. Thirty-five days […]
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