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  1. Materials Science

    Beyond Jell-O: New ideas gel in the lab

    Researchers have created a new class of hydrogels that might prove useful in tissue engineering, drug delivery, and other biomedical applications.

    By Jessica Gorman
  2. Health & Medicine

    Surgical Option: Removal of ovaries can prevent cancers in women at risk

    In women who harbor mutations in one of the BRCA genes, ovary removal reduces the risk of developing ovarian, peritoneal, and breast cancers.

    By Nathan Seppa
  3. Health & Medicine

    High elevation linked to hormone dearth

    Elderly Peruvian women living at very high altitudes have lower blood concentrations of some key hormones than do their lowland counterparts.

    By Nathan Seppa

  4. From the May 21, 1932, issue

    GENES, ONCE HYPOTHETICAL, NOW SEEN AND PHOTOGRAPHED Genes, the ultimate units in heredity, have been seen and photographed.