Features

• Better Than a Dog

  The search is on for a sensor that bests a canine at detecting explosives

  Gary Stix   | October 1, 2005  |

• The Forgotten Era of Brain Chips

  The work of Jose Delgado, a pioneering star in brain-stimulation research four decades ago, goes largely unacknowledged today. What happened?

  John Horgan   | October 1, 2005  |

• Founder Mutations

  A special class of genetic mutations that often cause human disease is enabling scientists to trace the migration and growth of specific human populations over thousands of years

  Dennis Drayna   | October 1, 2005  | 1

• Ripples in a Galactic Pond

  Astronomers are coming to realize that the beautiful shapes of galaxies are not merely incidental. They are essential to the galaxies' growth and development

  Françoise Combes   | October 1, 2005  |

• New Bull's-Eyes for Drugs

  A familiar class of cell-surface receptors turns out to offer an array of fresh targets that could yield new treatments for disorders ranging from HIV infection to obesity

  Terry Kenakin   | October 1, 2005  |

• Smart Wi-Fi

  Wireless access to the Internet via Wi-Fi is increasingly popular, so the technology is being upgraded to ensure that users get prompt, reliable service

  Alex Hills   | October 1, 2005  |

• A Cool Early Earth?

  The textbook view that the earth spent its first half a billion years drenched in magma could be wrong. The surface may have cooled quickly--with oceans, nascent continents and the opportunity for life to form much earlier

  John W. Valley   | October 1, 2005  |