The Fight for the President's Mind—And the Men Who Won It

Who got us into Vietnam? There is no way to say fairly now, for the responsibility is shared. Who Stopped the escalation? That story can be told.


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Where Time Comes From

The clocks that coordinate your cellphone, GPS, and more

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Computer Vision Syndrome and You

Save your eyes. Take breaks.

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What Happens in 60 Seconds

Quantifying human activity around the world

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