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  1. Antidepressants get overly positive spin

    Studies finding beneficial effects of antidepressant drugs for depressed patients get published far more often than do studies that uncover no antidepressant benefits.

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  2. Paleontology

    Life explodes twice

    The Ediacaran fauna were as varied as all animals in existence today and, more impressively, as in the Cambrian, report paleontologists.

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  3. Animals

    Fenced-off trees drop their friends

    Protecting acacia trees from large, tree-munching animals sets off a chain of events that ends up ruining the trees' partnership with their bodyguard ants.

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  4. Materials Science

    Life in Print

    Tissues printed with an ink-jet could provide patches for damaged organs, new cell-based materials for drug testing, new ways to probe cellular communication, living sensors, or even fuel cell–type batteries.