To nap or not to nap? Science is still waking up to the question

Sleep strategies need to be tailored to individuals, studies suggest

A construction worker naps in the midday heat.

A construction worker naps during his break on a hot day in New York City. Researchers are taking a new look at how snoozing during the day can supplement poor sleep schedules.

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In Muslim-majority Oman, most people wake before dawn for morning prayers.