No, mussels don't shut off Warsaw's water supply if they sense toxins — but they help monitor it
It's not true that the mussels automatically shut off the city's water supply. When the mussels' shell movements trigger an ...
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One Bustling City Is The Absolute Best Destination In Poland, According To Rick Steves
Travel expert Rick Steves says this overlooked city in Central Europe is one of the best on the continent. History buffs, art ...