Deena Mousa @deenamousa.com · Jun 17 The rats we're familiar with aren't native to North America. They hitched rides on ships with Europeans, and, by the late 1940s, they'd crossed Saskatchewan and were approaching Alberta's border at 24km/year.
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Albertans - worried about disease and crops - called a state of emergency. They set up a 'Rat Control Zone' on the border, covered it in pesticides, and sent inspectors to set up watch. To rally enough people, some bureaucrats were reassigned from weed inspection to rat patrols.