All mammals share the five senses we all learned to recite in early childhood: sight, hearing, taste, touch and smell. However, whereas we humans perceive the world largely through the first two of these, most mammals have more sophisticated senses of taste and smell. This inferiority has been immortalized in a famous poem by G.K. Chesterton, written in the voice of a dog, which begins: “They haven't got no noses These fallen sons of Eve…”

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