US monuments are getting covered in slime, and no one knows how to stop it – ScienceAlert

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Many major US monuments, including the Thomas Jefferson Memorial, are slowly turning from white to black, as biofilm – a catchall term for a group of microorganisms that come together to form slime – colonies start to run rampant in Washington DC.

Source: US monuments are getting covered in slime, and no one knows how to stop it – ScienceAlert

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