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The relationship between brain weight and body weight in mammals in double-logarithmic presentation. Some species of shrews, mouse, dog, horse and African elephant have ‘average’ brain weights; accordingly their data points lie exactly on the regression line. Chimpanzees, humans, but also dolphins have brain weights above average; some bat species, hedgehog, pig, hippopotamus, blue whale and sperm whale have brain weights below average. Adapted from [11]; modified after [11].
