Sleep - this is a very mysterious, causing intense interest to scientists, the state required, as we bring to all life on earth.But is it?Are all asleep?And what animals are sleeping with your eyes open?Let's look for them in the "bedroom".
So what animals sleep with your eyes open?
Pervyemi come to mind fish.They do not have eyelids, so their eyes are always open.In fact, sleep fish especially nobody worked, probably because this is not science any interest.But marine mammals - dolphins and whales - have been studied closely.And the researchers found that they could not afford to sleep in our understanding.And dolphins and whales have to surface periodically to breathe air.Because of what they have in turn sleeps only one hemisphere.And sharks do need to be worn under the water without stopping, as the air can get into their blood, only if the gills with high velocity water washes.
Is the cow sleeps with his eyes open?
interested in which animals sleep with their eyes open, many remember the giraffe.But this is not true!This myth is based, perhaps, on that particular weeks giraffe can go without sleep.It is enough to take a nap during the day about 20 minutes to recuperate.During this time he puts his head between the thick branches of the trees and, thanks to a strong neck muscles, not falling.And the animal lies down to sleep, and wraps around the neck down.
But cows, sheep and horses sleep standing up and without closing the eyes, and lying down, drooping eyelids.Obviously, they are forced to do this situation or mood.To sleep, they are missing four hours, and the rest of the time they just dozing.Incidentally, it was at this time a cow chewing its "chewing gum."Similar jaw movement she makes during that part of sleep, known as slow.But dreams and cows, and horses only see lying.
These animals belong to those who know how to sleep so-called "herd" sleep, during which the animals a rest mass, and more particularly vigilant guard of peace and bliss.Then the guard changing.
thinking what animals sleep with their eyes open, people, as a rule, also called snakes, having fused transparent eyelids, and insects that age do not have.
For example, the University of Pennsylvania researchers have discovered how sleep-fly Drosophila.It turns out that their sleep is fairly long - nearly eight.Roy flies with the spreading of a comfortable place, and each individual, lying on the abdomen and carefully turning away from food, sleep.And so: 5 hours a night and up to 3 hours during the day.
And what animal does not sleep?
Previously it was believed that during the migration of the birds do not sleep.But it turned out that it is not.Every ten minutes one of the birds flies in the middle of the pack and it sleeps.It happens this way: it moves its wings a little in order not to fall, and it carries the air flow created with the pack.Then replace it sneaks next bird.But to catch the time when sleeping cuckoo, has not yet succeeded.It is day and night in the "troubles."
Bees also are in constant motion.Perhaps they somehow relax, this is just a very short time or too often.
also changed the idea of the ants.They were previously ranked as animals that never sleep.But it turns out that they sleep about 4 hours a day.Just poured ants 250 times while sleeping 1 minute.By the way, waking up, they even stretch themselves!
