Features

• Does Dark Matter Really Exist?

  Ninety-five percent of the universe has gone missing. Or has it?

  Mordehai Milgrom   | August 1, 2002  | 4

• Saving Dying Languages

  Linguists have known for years that thousands of the world ¿s languages are at grave risk of extinction. Yet only recently has the field summoned the will--and the money--to do much about it

  W. Wayt Gibbs   | August 1, 2002  |

• Combating the Terror of Terrorism

  The psychological damage caused by the attacks of September 11 mirrored the physical destruction and showed that protecting the public¿s mental health must be a component of the national defense

  Ezra S. Susser, Daniel B. Herman and Barbara Aaron   | August 1, 2002  |

• Computers without Clocks: How a Rendezvous Circuit Works

  August 1, 2002  |

• Computers without Clocks: How a GasP Module Works

  August 1, 2002  |

• The Serious Search for an Anti-Aging Pill: How a Prototype Caloric-Restriction Mimetic Works

  August 1, 2002  |

• Computers without Clocks

  Asynchronous chips improve computer performance by letting each circuit run as fast as it can

  Ivan E. Sutherland and Jo Ebergen   | August 1, 2002  |

• The Ocean's Invisible Forest

  Marine phytoplankton play a critical role in regulating the earth¿s climate. Could they also be used to combat global warming?

  Paul G. Falkowski   | August 1, 2002  |

• The Serious Search for an Anti-Aging Pill

  In government laboratories and elsewhere, scientists are seeking a drug able to prolong life and youthful vigor. Studies of caloric restriction are showing the way

  Mark A. Lane, Donald K. Ingram and George S. Roth   | August 1, 2002  | 3