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EvoAnth  ·  4304 days ago  ·  link  ·    ·  parent  ·  post: Paying For Our Big Brains

As a general rule brain size relative to body size is a good predictor of intelligence, although other measures can be better in different lineages. For example, primates have a high neuron density thus absolute brain size is a good predictor of intelligence amongst them.

This high neuronal density also means that humans - despite not having the biggest brains - appear to have the most neurons of any animal.