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  1. Planetary Science

    Roving on the Red Planet

    NASA last month selected the landing sites for rovers scheduled to begin exploring the Martian surface next January.

    By Ron Cowen

  2. 19238

    “Sensing a Vibe: Seismic-alert system could give Los Angeles a few seconds’ warning” (SN: 5/3/03, p. 276: Sensing a Vibe: Seismic-alert system could give Los Angeles a few seconds’ warning) says that the S waves travel at about one-half the speed of the P waves. Then, in this article, it would appear that the P […]

    By Science News
  3. Earth

    Seismic waves resolve continental debate

    New analyses of seismic waves that have traveled deep within Earth may answer a decades-old question about the thickness of the planet's continents.