These cats range in size from the small Black-footed Cat, which is only about the size of a housecat, to the large Tiger, which can weigh up to 650 pounds. Other interesting facts include that some cats can purr, while others can roar, and that some cats are nocturnal while others are more active during the day. These cats all have unique characteristics that make them stand out. For example, the cheetah is the fastest land mammal, the snow leopard...