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  1. Humans

    Amphibian debuts

    Hunt for lost frog turns up new species in Colombian rain forests.

    By Rachel Ehrenberg

  2. It’s enough to give you heartburn

    Wonder drugs they may be, but PPIs are overprescribed and pose some health risks.

    By Nathan Seppa

  3. The final climate frontiers

    Scientists aim to improve and localize their predictions.

    By Alexandra Witze

  4. Tiny tubes, big riddles

    Carbon cylinders’ odd traits continue to stump scientists.

    By Rachel Ehrenberg

  5. Science Future for December 4, 2010

    December 5Closing ceremony of the 2010 World Memory Championships in Guangzhou, China. See www.worldmemorychampionship.com December 13 – 14Geminid meteor shower, all night but best after moonset around midnight.