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Lake Retba in Senegal is a salt lake which is naturally bright pink like strawberry milkshake.

The colour comes from microbes which use a type of photosynthesis which evolved separately to the kind that plants use. The chemical machinery those microbes use is rhodopsin – the same stuff which is found in your retinas, allowing you to see.

Gah. Had to delete and redraft this to fix a silly mistake. That's what I get for trying to write stuff while half asleep on the bus to campus.

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@Cyborgneticz
Everything about these pink lakes is so fascinating to me. I may have fallen down a Wikipedia hole one afternoon, which I proceeded to stay in all night long!

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Sunbeam City is a Libertarian Socialist solarpunk instance. It is ran democratically by a cooperative of like-minded individuals.