Video shows some of the world's largest, most powerful, strongest, and rarest cats. Also shows cat stalking prey, killing, and eating it. Although cats are top predators, they are the most delicate animals in the ecosystem. They become extinct the most quickly, because they live off the fat of the land. The Amur (Panthera tigris altaica) also called the Siberian Tiger, shown here, is the world's largest cat. It has an average weight of around 500 lb for males, but can reach around 600-675 lb and possibly up to 845 lb. Probably less than 500 exist in the wild. Nine subspecies of tiger exist, 3 of which are extinct. The Amur is the largest and now confined in the wild to an area in Siberia. They can be a long as a car, have huge dagar-like canine teeth, and thick fur of a golden hue. The white tiger can be very inbred. The range of the lion (Panthera leo) once extended across Africa and into Asia. Many are critically endangered, as is the white lion. Males can weight up to 550 lb....