Telegraph: Scientists from Obihiro University in Japan have found that subjecting potatoes to either ultrasound or an electric shock can almost double the levels of antioxidants, making the potatoes more nutritious. As a result, potatoes, the fifth most widely consumed plant staple in the world, could become one of nature’s “superfoods.” The researchers presented their findings at the 240th national meeting of the American Chemical Society in Boston, Massachusetts, on Sunday. Last month, researchers from Jerusalem’s Hebrew University demonstrated that boiled potatoes make better potato batteries.