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POPSOne World, Many Minds: Intelligence in the Animal Kingdom In recent decades scientists have cast aside a linear, sequential view of brain evolution in which the human brain incorporates components resembling the brains of modern fishes, amphibians, reptiles and birds and have adopted a new view of divergently branching brain and mind evolution. Substantial cognitive abilities have evolved multiple times, based on differing neural substrates—including the mental agility that enables us humans to decipher brain evolution and its meaning