About three years ago, Julie Wolfe started collecting water samples from across the country. She went to New York, Texas, DC, and Maryland, pouring each sample into a jar then mixing in natural ingredients, like squid ink, sandalwood, beets, and turmeric, as well as chemicals like copper sulfate, crystal violet, and methylene blue. She arranged the jars onto shelves, connected them with tubes, and lit the whole thing from behind...