Female orcas have an EQ of around 2.7, which is higher than a chimpanzee’s, and also outdoes the males of their own species. Male orcas, with their bigger bodies, have an EQ of just 2.3. This disparity between the sexes flies in the face of Darwin’s proclamation of male intellectual superiority, and is thought to be linked with the female orca’s increased social and leadership skills, which require more cognitive power than the male needs.3
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