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  1. Health & Medicine

    Give It Up: Cutting back helps, but even a cigarette or two a day carries risks

    Reducing tobacco use curbs the risk of lung cancer, but smoking even a few cigarettes a day puts a person at three to five times the risk faced by a nonsmoker.

    By Nathan Seppa
  2. Health & Medicine

    Better Beta: Cells grown in lab may treat diabetes

    Scientists have developed a technique to mass-produce a type of pancreas cell needed for transplants into people with type 1 diabetes.

    By Katie Greene
  3. Chemistry

    Into the Void: Porous crystals could do more chemistry

    Chemists have devised a new approach that creates crystalline material with some of the largest pores yet.