News

  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. 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.

    By Sid Perkins
  3. Health & Medicine

    Protein implicated in Parkinson’s disease

    Inhibiting the natural protein cyclo-oxygenase-2, or COX-2, might help fight Parkinson's disease.

    By Nathan Seppa
  4. Physics

    To pack a strand tight, make it a helix

    The optimal way to pack long strings into small spaces is to coil them into helices—particularly the types of helices found in proteins and perhaps DNA.