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  1. Health & Medicine

    Obesity and Genetics

    Studies show that genes are a significant factor in developing obesity. The Centers for Disease Control and Prevention provide an online guide to the problem of obesity and insights into current research on the genetics of obesity. Go to: http://www.cdc.gov/genomics/training/perspectives/obesity.htm

    By Science News
  2. Animals

    Hyena androgens exact high cost

    Blocking androgens for spotted hyenas before they're born shows that the exposure of a female fetus to male hormones normally takes a heavy physical toll when females bear their own pups.

    By Susan Milius
  3. Animals

    Deer littermates have different dads

    Twin fawns may not have the same dad—the first time multiple paternity has turned up in a large, free-ranging hoofed mammal.