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  1. Tech

    Microwave mirror hits the spot

    A technique for rebounding and refocusing sound also works for electromagnetic waves, possibly opening new uses ranging from improving cell phone communication to treating illness.

    By Peter Weiss
  2. Health & Medicine

    Americans eat faster, and more

    More and more people are eating at fast-food restaurants, and they down significantly more calories on the days they do.

    By Janet Raloff
  3. Chemistry

    Crystal could generate pure hydrogen fuel

    An organic crystal's unusual molecular-trapping behavior could help drive a new hydrogen economy.

    By Alexandra Goho
  4. Health & Medicine

    Statins might fight multiple sclerosis

    Cholesterol-lowering statin drugs might work against multiple sclerosis by reducing inflammation, preliminary evidence suggests.