Thousands of years of human dependence has shrunk your cat’s brain, new research suggests.

In a study published Jan. 26 in the journal Royal Society Open Science, researchers compared the cranial measurements (an indicator of brain size) of modern house cats with that of two of their closest wild ancestors, African (Felis lybica) and European wildcats (Felis silvestris). The team found that cranium size — and therefore brain size — in domesticated cats has shrunk significantly over the past 10,000 years or so compared with their wild ancestors.


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