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  1. The costs of putting knowledge into the wrong hands

    As a chemist at Purdue University in West Lafayette, Ind., David Nichols studies psychedelic compounds in a quest to understand the brain, often creating new compounds as part of his research. He was recently dismayed to find himself cited by name in a newspaper article about an amateur chemist who scours the scientific literature for […]

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  2. Health & Medicine

    Body & Brain

    A controversy about the benefits of extensive breast cancer surgery, plus more in this week’s news.

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  3. Tech

    The numbers prove it: This is a data age

    An assessment of the world’s computing capacity documents a staggering rise in power and storage since 1986.