Are you a cat owner? If so, you must have noticed that when cats sleep, they often lie on their left side more often than on their right. Researchers from the University of Bari Aldo Moro, Ruhr University Bochum, Medical School Hamburg and from Canada, Switzerland and Turkey have published a research paper saying that it is a strategy to ensure survival.
In this study, 408 videos of sleeping cats were analyzed and based on observations, it may be due to how the hemisphere of the cat's brain works. When a cat sleeping on its left side wakes up, it uses the left visual field. This is processed by the right hemisphere of the brain, which is specialized in spatial awareness, threat processing and coordination of movements when fleeing.
With this advantage, the probability of a sleeping cat to perceive a threat and then perform the process of avoiding danger is higher than that of a cat sleeping on its right side. The research paper was published in the journal Current Biology.