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  1. Health & Medicine

    Dieting woes tied to hunger hormone

    A rise in the appetite-enhancing hormone ghrelin after weight loss may explain why dieters regain pounds.

    By John Travis
  2. Health & Medicine

    Arthritis drug fights Crohn’s disease

    The inflammation-fighting drug infliximab can hold off the painful symptoms of Crohn's disease for as long as a year in many patients.

    By Nathan Seppa
  3. Math

    Candy for Everyone

    Several students are sitting in a circle. Each student has an even (though not necessarily the same) number of wrapped pieces of candy. On a signal, each student passes half of his or her trove to the student on his or her right.