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Intelligence relies in part on ‘working memory,’ which temporarily stores information needed for ongoing cognitive processes. In mammals, working memory is housed in the prefrontal cortex. Corvids (birds including crows and ravens) are known for their intelligence and also have a working memory. But their brain structure is different from that of mammals and lacks a layered neocortex, leading researchers to ask where working memory is located in these birds.
Lab Anim. (NY) 43, 259 (2014).
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