The existence of reproductive isolation, so that these situations can not occur, even if there are some individuals of different species sometimes complete the mating, but they generally can not produce offspring, or produce offspring can not continue to reproduce

In fact, the earth's crust itself is a natural source of minerals, many soil and rocks contain a certain amount of salt, careful observation of cattle and sheep should know, cattle and sheep in the grass, but also often "eat soil" or lick the stone, they do so, in fact, the purpose is to obtain the salt

Zebras have black and white stripes on their bodies, which makes them a bit higher in face value than horses, and they are not small enough to carry a lot of weight, and the bottom line is that today there are three species and nine subspecies of zebra, and a lot of them in the wild.If that's the case, why don't africans tame them to use as mounts? Let's have a chat about this interesting question.