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Sensory cues that predict reward or punishment are fundamental drivers of animal behavior. For example, attractive odors of palatable food or a potential mate predict reward, while aversive odors of pathogen-laced food or a predator predict punishment. Aversive and attractive odors can be detected by intermingled sensory neurons that express highly related olfactory receptors and display similar central projections. These findings raise basic questions of how innate odor valence is extracteddoi:10.1016/j.cub.2014.11.044 pmid:25649823 pmcid:PMC4317791 fatcat:fppp67il5rfn5ek4praeztstpy