What about hunter–gatherers?

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     Did the authors of a recent report on "refrigerator blindness"1 consider that men, as hunters, are programmed to spot moving game, whereas women, as gatherers, are programed to spot stationary edible plants and fruit?

    Just a thought.

    REFERENCE

    Macnab AJ, Bennett M. Refrigerator blindness: selective loss of visual acuity in association with a common foraging behaviour. CMAJ 2005;173(12):1494-5.(John Fisher)

    http://www.100md.com/html/DirDu/2006/07/22/11/96/26.htm