In John Lily’s memory

Hello there!

Brain size was previously considered a major indicator of the intelligence of an animal. However, many other factors also affect intelligence. Recent discoveries concerning bird intelligencehave called into question the usefulness of brain size as an indicator.[1] Since most of the brain is used for maintaining bodily functions,[citation needed] greater ratios of brain to body mass may increase the amount of brain mass available for more complex cognitive task.

 

http://en.wikipedia.org/wiki/Cetacean_intelligence#Brain_structure

 

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