"Sleep deficiency tugs at our personal happiness, costs the US economy $45bn a year and takes an enormous toll on our health."
"Not getting the rest we need can impair our physical and mental health sometimes to drastic degrees."
"The Inner Clock shows up modern life's chaotic and often dangerous effects on our circadian rhythms - tempos set by little internal clocks within our bodies that govern our sleep, energy, moods, and metabolism."
"I grew up in Seattle, where winters are dark, and we're at a high latitude, so those days are also really short... I remember feeling better and like my mood was lifted."
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