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  1. Wrong Impression: Bipolar kids misinterpret facial cues as hostile

    Children with bipolar disorder are more likely than other kids to read hostility in bland facial expressions.

    By Nathan Seppa
  2. Earth

    Lazarus, the amphibian

    The painted frog, unseen for more than a decade and feared to be extinct, has resurfaced in a remote desert highland of Colombia.

    By Ben Harder

  3. Herpes Runs Interference: Researchers discover how virus sticks around

    Herpes simplex virus 1, which causes cold sores, uses a short, double-stranded RNA to outwit a cell's defensive measures.

    By Christen Brownlee
  4. Earth

    Pumped-up Poison Ivy: Carbon dioxide boosts plant’s size, toxicity

    Rising carbon dioxide in the atmosphere could make poison ivy grow much faster and become more toxic.