Camping with President Theodore Roosevelt

"He is doubtless the most vital man on the continent, if not on the planet, to-day. He is many-sided, and every side throbs with his tremendous life and energy."


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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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