AdvertisementThe Jefferson Memorial and a hallowed shrine at Arlington National Cemetery have been stained with dark blotches. “This thing,” said Audrey Tepper, a National Park Service historic architect who is overseeing the effort to get the stuff off the Jefferson Memorial. Now it is everywhere.”“This thing,” Audrey Tepper, a National Park Service historic architect, said of the “biofilm” on the Jefferson Memorial. Standing atop the elaborate scaffold that now shrouds the Jefferson Memorial, Tepper pointed to the intersecting roadways and flight paths nearby. And some of the bacteria in it might even be useful at solving problems that have nothing to do with the Park Service.

Source: Los Angeles Times October 30, 2019 09:56 UTC