Cyanotoxin which is why they are usually green or blue. Cyanobacteria are found almost everywhere; in oceans, lakes and rivers as well as on land. They flourish in Arctic and Antarctic lakes, hotsprings and wastewater treatment plants. They even inhabit the fur of polar bears, to which they impart a greenish tinge. Cyanobacteria produce potent toxins, but they also produce helpful bioactive compounds, including substances with antitumour, antiviral, anticancer, antibiotic and antifungal activity, UV protectants and specific inhibitors of enzymes. Cyanotoxins are often implicated in what are commonly called "red tides" or "harmful algal blooms". Lakes and oceans contain many single-celled
Fountain of the Great Lakes Fountain of the Great Lakes Fountain of the Great Lakes, or Spirit of the Great Lakes Fountain, is an allegorical sculpture by Lorado Taft in the Art Institute of Chicago South Stanley McCormick Memorial Court south of the Art Institute of Chicago Building in the Loop community area of Chicago. It is a bronze work of art created between 1907 and 1913. The fountain depicts five women arranged so that the water flows through them in the same way water passes through the Great Lakes. Note that the Great Lakes waterflow starts in Lake Superior at above sea level and