Editor's Note

  1. Life

    A new view of dinosaurs, a clearer view of lunar origins

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  2. Tech

    Scientists struggle to find signals in the noise

    Even in a simple system like email, detecting the signal from the noise is not always easy. It can be even more difficult separating a dazzling discovery from dust or whether a breast mass is cancerous or benign.

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  3. Health & Medicine

    Your brain on marijuana: two views

    Many of the “facts” that people believe to be true about marijuana are not supported by science, and while the pro-pot lobby cherry-picks data to support its arguments (denying marijuana’s addictiveness, for example), so too do anti-marijuana groups, which play up pot’s dangers.