Reefer Madness

Marijuana has not been de facto legalized, and the war on drugs is not just about cocaine and heroin. In fact, today, when we don't have enough jail cells for murderers, rapists, and other violent criminals, there may be more people in federal and state prisons for marijuana offenses than at any other time in U.S. history


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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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