Features

• The Unexpected Youth of Globular Clusters

  Conventional wisdom says that globular star clusters are the stodgy old codgers of the universe, but it turns out that many of these clusters are young

  Stephen E. Zepf and Keith M. Ashman   | October 1, 2003  |

• Artificial Muscles

  Novel motion-producing devices--actuators, motors, generators--based on polymers that change shape when stimulated electrically are nearing commercialization

  Steven Ashley   | October 1, 2003  | 1

• China's Great Leap Upward

  By boosting astronauts into orbit, China hopes to become the newest superpower in space

  James Oberg   | October 1, 2003  |

• Tumor-Busting Viruses: But Is it Safe?

  Many approaches to virotherapy use adenoviruses, which caused a death in a clinical trial of gene therapy four years ago

  Dirk M. Nettelbeck and David T. Curiel   | October 1, 2003  |

• Meltdown in the North

  Sea ice and glaciers are melting, permafrost is thawing, tundra is yielding to shrubs--and scientists are struggling to understand how these changes will affect not just the Arctic but the entire planet

  Matthew Sturm, Donald K. Perovich and Mark C. Serreze   | October 1, 2003  |

• Tumor-Busting Viruses: Targeting Melanoma

  Dirk M. Nettelbeck and David T. Curiel   | October 1, 2003  |

• Tumor-Busting Viruses: Zapping Cancer Cells with Viruses

  Dirk M. Nettelbeck and David T. Curiel   | October 1, 2003  |

• Tumor-Busting Viruses: Selected Companies Involved in Virotherapy

  Dirk M. Nettelbeck and David T. Curiel   | October 1, 2003  |

• Tumor-Busting Viruses

  A new technique called virotherapy harnesses viruses, those banes of humankind, to stop another scourge--cancer

  Dirk M. Nettelbeck and David T. Curiel   | October 1, 2003  |

• The Economics of Child Labor

  Campaigns against child labor are most likely to succeed when they combine the long arm of the law with the invisible hand of the marketplace

  Kaushik Basu   | October 1, 2003  |