Why it’s called ‘the graveyard shift’

Research out today shows higher rates of breast and prostate cancer among women and men whose work day starts after dark.

Next month the World Health Organization will consider declaring shift work “a probable carcinogen.”

What’s already on that list?

* Art glass, glass containers and pressed ware (manufacture of)

* Cobalt metal with tungsten carbide

* Hairdresser or barber (occupational exposure as a)

* Petroleum refining (occupational exposures in)

* Sunlamps and sunbeds (use of)

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