(Ocean Robbins) Henry Albright Mattill was obsessed with the possibility that milk was the “perfect food.” The professor of biochemistry ran a series of experiments, starting in 1920, in which he fed a group of rats nothing but cow’s milk for their entire lives. Aside from the grim monotony (no 31 flavors here), the rats appeared to thrive. (Our view on the use of animals in medical research is here.)