sleep is profoundly intertwined with virtually every aspect of brain health. Lack of sleep over time can lead to an irreversible loss of brain cells — yet another debunking of the myth that sleep debt can be made up.

And when we’re living a life of perpetual time famine, we rob ourselves of our ability to experience another key element of the Third Metric: wonder, our sense of delight in the mysteries of the universe, as well as the everyday occurrences and small miracles that fill our lives.

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Those who can sit in a chair, undistracted for hours, mastering subjects and creating things will rule the world — while the rest of us frantically and futilely try to keep up with texts, tweets, and other incessant interruptions.

«Lo que necesitamos — dijo Koehn — es sabiduría, porque la información... no es igual al conocimiento, y el conocimiento no es igual al entendimiento, y el entendimiento no es igual a la sabiduría...

"At Dartmouth, computer-science professor Andrew Campbell collected data from students using a mobile app called StudentLife and discovered that the average bedtime for students was 2:30 a.m. It's no wonder that a Dartmouth health survey showed that more than half of the students had experienced sleep difficulties within the past year. Freshman Kristin Winkle said, "I think sleep is seen as the enemy of fun, or of productivity." Freshman Rob Del Mauro cited FOMO as the reason sleep was sacrificed, calling sleep a "taboo practice" at Dartmouth. And sophomore Ke Zhao tells her roommate that "the trade-off for A's are Z's.