A New Study Underscores the Cognitive Ability of Ravens -- and raises the Question of Parallel Evolution in Intelligence

In the entirety of the animal kingdom, humanity has never held a monopoly on intelligence: considering that the concept of intelligence boils down to the ability to gather and usefully process information, this means that virtually all creatures possess at least some degree of intelligence. Humans tend to stand apart in this regard, due to the degree that our capacities have developed to, but even then many of these cognitive traits are shared with some of our non-human brethren: great apes such as chimpanzees are adept tool-users, prairie dogs have a sophisticated vocabulary, and octopuses have excellent problem solving skills.

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