The magic of the world lies not only in the balance of natural laws, but also in the uniqueness of everything. In this complex and changeable natural social environment, we also spy on the uniqueness and non-replicability of everything from the differences of everything. Among them, apart from the differences in form, the differences in living habits can also arouse people's curiosity. Like why a horse? Standing? Aren't you afraid of falling when you sleep? ?

First, horses can sleep standing up, which is inseparable from heredity.

First of all, we should know that a long time ago, horses were not used by us humans. They used to be wild. Now horses sleep standing up, which is inseparable from the inheritance of wild horses. In the past, wild horses lived in nature and there were countless dangers in nature. Horses are herbivores and have no sharp teeth. The skills that wild horses rely on only come from the speed brought by their developed limbs. When they are in danger, they can only escape from it. ?

Second, the horse will sleep standing up, reducing the load on the heart.

Secondly, the horse's heartbeat rhythm is particularly fast and energy consumption is particularly fast. A heavy body will oppress its heart, so lying down for a long time will lose your life. Sleeping on the ground is undoubtedly suicide for Malay, so the horse can only stand and rest to reduce the load on the heart. ?

Third, because of the special body structure, horses will not fall when sleeping standing up.

So why don't horses fall when they sleep standing up? Actually, it's because the mechanism of horses is very small. A horse's front legs have six joints, which provide stable support when the horse sleeps standing up. With this special mechanism on the front legs, the horse will not fall unconscious when sleeping, nor will it be powered by muscles. The brain need not be nervous.

In addition, there are many animals in the animal kingdom who can sleep standing up. The reason why they can sleep standing up is not only the structural conditions of their bodies, but also the consideration of safety factors in long-term field survival.