An interesting research conducted by scientists from Oxford and recently published in the Proceedings of the National Academy of Sciences charted the evolution of brain size across various mammal groups and came up with a rather unusual but expected conclusion: that dogs are smarter than cats.

Mammals such as monkeys, horses, dolphins and dogs that are typically involved in social groups were found to have larger brains, suggesting that the brain size evolved due to the need to think in social environments. Slower brain growth and consequently smaller brain sizes were observed in other mammals that include rhinoceros, deer and cats, which were found to lack social skills and more inclined to live solitary lives.

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