Contrary to popular belief, the modern domestic horses do not sleep standing up. Standing, they can only be in a state of some slumber. A full bed is a pastime can not be named. In order to dive in at the deep sleep, during which will relax both body and mind, a horse, of course, lie. More often than not on his side.
However, due to the structural features of the body, its weight, as well as subtlety bone bed in this condition the horse can no more than 3-4 hours. If the horse will lie on your side for more than 6 hours, it starts pulmonary edema.
Dolphins, unlike other mammals, sleep is arranged in an interesting way. When it comes to recreation, dolphin disables only one hemisphere of the brain, closing the opposite eye. The other half of the brain at the time follows the surroundings, controls breathing and other basic physiological processes.
During this dream dolphins can stay on the surface of the water, sometimes slow drift. In captivity dolphins are sometimes sleeping on the bottom of the pool, occasionally rising to the surface for air.
Perhaps one of the most interesting questions - it's like sleeping giraffes? Indeed, at first glance, with a long neck to get a vacation it is quite problematic. But the nature of all thought. Giraffes sleep, bending his neck so that his head was on the bottom of the rear limbs. The whole process of laying takes 15-20 seconds. Please giraffes sink to the chest and then in the stomach.
Interestingly, giraffes sleep only for a few minutes at a time. The duration of deep sleep per night less than 20 minutes.
For a long time it was believed that whales sleep as well as dolphins - disabling one hemisphere alternately. But recent research scientists have shown that it is not. It turned out that whales sleep during short periods of rapid immersion in water. Thus, a clear allocation of days to sleep and waking them not. Whales "gain" for 10-15 minutes of sleep for several hours.
As is the case with horses, There is a myth that penguins sleep standing up. This is certainly not the case, at least, not exactly. Firstly: the penguins in the world there are several types and many of them are sleeping in different ways. For example, gentoo penguin, and some other sleep as if they were not weak party yesterday. Well, just without the hind legs.
And next - Emperor penguins, which, too, is hardly a worthwhile. Rather, it's sitting posture. Penguins stand and walk very differently.
Most of the life of hippos spend in the water. Usually they are sleeping or in the shallows, holding the upper part of the head or completely immersed in water. In the latter case, hippopotamus reflex resurfacing every 3-5 minutes to inhale. However, they did not even wake up.
It is often said that squirrels are sleeping, wrapped in a ponytail. Not that it was not so, but rather a part of the truth. Indeed proteins in this respect, similar to many other animals, they sleep as will fall. Just as we are. Sometimes they wrap themselves in the tail, and sometimes like the penguins returning from partying.
Let's start with the fact that there are African and Indian elephants, and they sleep in different ways. African often sleep standing up, leaning sideways against a tree trunk, or around his trunk. This is due to the fact that African elephants are afraid of overheating of the body is too hot soil. If the land is not too hot, they can sleep on the living, tucked his feet under him, or on his side.
Indian elephants often sleep lying down, bending his hind legs and front stretching forward and resting his head on them. Dream elephants lasts about 2-3 hours. The animal can wake up, listen and sniff for danger, and then fall asleep again.
More some animals that refute the myths about their own dreams - it opossums. Yes, they have a very strong tail, yes, they can hang on it upside down on a tree branch, but they do not sleep in this position. Generally, opossums - nocturnal animals during the day they rest, sleep, and after dark, go for prey. Sleep opossums many, sometimes up to 18-20 hours per day. To do this, they are located on a tree branch, or curled up in a hollow, and other shelters.
Swifts are known for their records. This is one of the fastest-flying birds, and certainly the longest flying birds. Swift may be in the flight up to 4 years. All the while, the bird eats, drinks, sleeps and even mates fly. Young swift, first raised in the air, can fly up to 500 thousand kilometers before the first landing.
To sleep in a dream, the birds are gaining greater heights, up to three thousand meters and then fly at an angle to the wind direction, changing flight direction every few minutes. With this rhythm, swifts continue to fly back and forth over the same spot. But in light winds, as seen in a dream swifts fly in a circle.
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