Experimental results on Cold Fusion are reviewed. Most experiments find no effect and the upper limits are appreciably lower than the positive effects claimed in some experiments. It is concluded that: (a) there is no excess heat production and (b) the balance of evidence is strongly against fusion products. A curious Regionalization of Results is observed where only negative results are found in some parts of the world and only positive results in other parts. Further, the ratio of positive to negative results varies with time. Previous studies of palladium indicate that fusion should not occur inside the metal. Cold Fusion is best explained as an example of Pathological Science.