Brain size is one aspect of animal anatomy and evolution. Both overall brain size and the size of substructures have been analysed, and the question of links between size and functioning - particularly intelligence - has often proved controversial. Brain size is sometimes measured by weight and sometimes by volume (via MRI scans or by skull volume).
Read more about Brain Size: Comparisons Among Animals, Modern Humans
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“When the situation is, what we would wish, nothing is so ill- timed as to hint at the circumstances which make it so: you thank Fortune ... you had reason—the heart knew it, and was satisfied; and who but an English philosopher would have sent notices of it to the brain to reverse the judgment?”
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