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  1. Share Alike: Genes from bacteria found in animals

    Bacteria swap genes all the time, but it now appears that they can give their DNA to some animals as well.

    By Patrick Barry
  2. Math

    Kidney Matchmaking

    A mathematical optimization strategy for pairing patients who need kidneys with willing donors could increase the number and quality of transplants.

    By Julie Rehmeyer
  3. Humans

    Letters from the September 1, 2007, issue of Science News

    Risk reversal? “Diabetes drug might hike heart risk” (SN: 6/23/07, p. 397) reports 86 heart attacks among 15,560 rosiglitazone (Avandia) users, versus 72 others in a control group of 12,283. A study coauthor then says that “after statistical adjustment, that yields a 43 percent higher risk of heart attacks among rosiglitazone users.”