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‘Rat Park’ is the name given to a series of studies undertaken in the late 1970s by Bruce K. Alexander and colleagues. They found that rats housed in enriched environments consumed less morphine solution than those in isolated cages, when rats were pre‐exposed to morphine, naive to morphine, and whether they had spent their early life in isolation or in enriched housing. The measured conclusions from the authors at the time have become somewhat lost in translation.