
Whether it be a candle or a lightbulb, humans have historically found a multitude of ways to get around the darkness that nighttime brings. And now, we have more distractions than ever before that bring light into the night, from cars driving past our windows to phone and laptop screens. We may be more productive, but we’re also sleeping less: in 1910, most people slept 9 hours per night; now, one-third of Americans are getting less than 7 hours of sleep on a regular basis.
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