Lake Hillier - Middle Island - Australia online puzzle
It is a lake located on Middle Island, the largest island in the La Recherche archipelago in Australia. The island and lake are believed to have been first charted by the Flinders Expedition in 1802. Although the origin of their pink color has not been definitively established, the pink color of other salt lakes in the region is known to arise from a medium contrast created by organisms Dunaliella salina and Halobacteria. Another hypothesis is that the pink color is due to red halophilic bacteria or algae in the salt crusts. The pink color of the lake is permanent and does not change when the water is poured into a container.
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