You're running for the most important office in the entire world, and here you are dressing like somebody working the night shift at Wal-Mart.

WSJ: How Mitt Romney and Rick Santorum Should Be Dressing | Moving Targets

And when sleeping pills aren't enough to help patients stay alert, a wakefulness drug called Provigil is already approved for excessive daytime sleepiness caused by narcolepsy, sleep apnea and shift-work sleep disorder--the exhaustion brought on in some people by working the night shift.

FORBES: Sleep On Demand

For the research on shift-working suggests that human beings are ill-adapted to working at night, says Simon Folkard, who studies shift-work from the University of Wales in Swansea.

ECONOMIST: No more nine-to-five

CalMac is to meet the staff's union on Tuesday to discuss changes to weekend and shift allowances, night working payments and annual holiday bonuses.

BBC: Talks due on Caledonian MacBrayne shore staff's pay