Scientists say that during evolution, many animals have developed a very unique skill called "half-brain sleep", meaning that one eye is closed when sleeping, and the other eye remains open. big to watch for dangerous precautions.
Animals can sleep half a brain
Crocodile
Last week, Australian scientists confirmed crocodiles still open one eye while sleeping to watch. Some experts say that in terms of neurology, this discovery needs to be confirmed by an EEG, because the "half-brain" phenomenon is mainly found in mammals and birds, less when seen in reptiles. (Photo: Thinkstock).
Bottled dolphin
Bottled dolphins know how to "turn off" half of the brain when sleeping, while the other half is still ready to react to every event. This awake half-brain is also in charge of breathing and floating on the water, ensuring that the dolphins do not suffocate. (Photo: Baltimoresun).
White whale
This white whale with a bulky head and lovely appearance also knows how to keep half the brain alert while sleeping. (Photo: Discovery).
Mouse dolphin
Mouse dolphins use their brains to control their breathing, so half of their brains are still awake while they sleep to control breathing and watch out for their surroundings. (Photo: Wikimedia).
South American sea lions
South American sea lions also know how to sleep an eye and keep half of their brains awake, in case of danger. (Photo: Thinkstock).
Amazon manatee
This popular small sea boar in the Amazon is also a creature that applies a "half-brain" strategy. (Photo: Thinkstock).
Big cut birds
Predator species such as large cut birds also need to keep an eye open while sleeping to watch for hazards. (Photo: Thinkstock).
Birds
In the bait field, predators are always lurking, thrush should always be alert, even while sleeping. (Photo: Thinkstock).
Mallard
Living in a wild environment with many dangers lurking, mallards always open one eye and keep half of their brains awake while sleeping to be ready to fly when there is movement. (Photo: Thinkstock).
