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  1. Paleontology

    Lost-and-found dinosaur thrived in water

    Fossils pieced together through ridiculous luck reveal Spinosaurus to be the only known dinosaur adapted for regular ventures into water.

    By Susan Milius
  2. Health & Medicine

    Clinical trial reanalyses may alter who should get treated

    Reanalyses of clinical trial data sometimes lead to different treatment suggestions.

    By Tina Hesman Saey
  3. Paleontology

    Fossils push back origins of modern mammals

    Fossils of three newly identified early mammals from China suggest that the common ancestor of today’s mammals lived over 200 million years ago.

    By Meghan Rosen
  4. Microbes

    Speedy test could improve treatment of urinary tract infections

    A new test for drug-resistant bacteria may speed the diagnosis and treatment of urinary tract infections.