News

  1. Health & Medicine

    Mixed Results: AIDS vaccine falters in whites, may help blacks

    In its first large test, an AIDS vaccine has failed to shield an at-risk population from acquiring AIDS.

    By Nathan Seppa
  2. Materials Science

    Waterproof Coats: Materials repel water with simplicity, style

    Researchers have produced new types of water-repelling surfaces, including one that's colorful and another made of inexpensive plastic.

    By Jessica Gorman
  3. Earth

    Sexual Hang-Up: Fish hormones change when oxygen is scarce

    Oxygen deprivation—an escalating problem in freshwater ecosystems worldwide—tampers with sex hormones in carp and might underlie the decline in some fish and amphibian species.

    By Kendall Morgan
  4. Anthropology

    Pieces of a Disputed Past: Fossil finds enter row over humanity’s roots

    Two new fossil discoveries have fueled scientific debates about the evolutionary status of a pair of species traditionally considered to have been our direct ancestors, Homo habilis and Homo erectus.