Dogs don't crawl in your suitcase when you're packing, partly because they're too stupid to understand what a packed suitcase means.
In the wild, cat mothers teach their young how to eat their food by bringing home dead or injured prey. Domestic cats are no different. But in this modern age of spayed domestic cats, many female felines have no young to whom they need to pass on their hunting wisdom.
By leaving a dead animal on the back porch, your cat is acting out its natural role as mother and teacher. You, her loving owner, represent her surrogate family. And frankly, she knows you would never have been able to catch that delicious mouse on your own.
Their brains may be small compared to ours, occupying only about 0.9 percent of their body mass compared to about 2 percent in an average human and about 1.2 percent in an average dog. But size doesn't always matter. Neanderthals, the hominids that went extinct more than 20,000 years ago, had bigger brains than Homo sapiens, but they probably weren't smarter than the Homo sapiens that beat them in the survival game.
Surface folding and brain structure matter more than brain size. Unlike the brains of dogs, the brains of cats have an amazing surface folding and a structure that is about 90 percent similar to ours. The cerebral cortex of cats is greater and more complex compared to that of dogs. The cerebral cortex is the part of the brain responsible for cognitive information processing. A cat's cerebral cortex contains about twice as many neurons as that of dogs. Cats have 300 million neurons, whereas dogs have about 160 million. In fact, cats have more nerve cells in the visual areas of their brain, a part of cerebral cortex, than humans and most other mammals.
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