Marijuana and the Law

The vigorous enforcement of marijuana laws has resulted in four million arrests since the early 1980s. Owing to mandatory-minimum sentences, many of those convicted are receiving stiff prison terms, even as violent criminals are released for lack of space. The second part of a two-part article. [See Part 1.]

How We Become What We Are

New studies suggest that some aspects of human personality are inborn and resistant to change. Ironically, this makes the role of environment all the more important in shaping individual lives


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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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