> Not sure how to interpret this. In the 1800's, a 12-hour shift 6 days a week was normal. Life expectancy wasn't much different (except child mortality of cour

> Not sure how to interpret this. In the 1800's, a 12-hour shift 6 days a week was normal. Life expectancy wasn't much different (except child mortality of course). Are you sure? I seem to remember otherwise.