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Features

A Zeppelin for the 21st Century

By developing new aerodynamic computer models and using modern materials, the company that originated zeppelins has returned them to the skies over Europe

By Klaus G. Hagenlocher

The Balloon That Flew Round the World

To build a balloon capable of circumnavigating the globe, engineers ripped a page from aeronautical history

By Phil Scott

Floating in Space

Balloons offer scientists a low-cost, quick-response way to study the upper reaches of Earth's atmosphere and those of other planets

By I. Steve Smith Jr. and James A. Cutts

The Fate of Life in the Universe

Billions of years ago the universe was too hot for life to exist. Countless eons hence, it will become so cold and empty that life, no matter how ingenious, will perish

By Lawrence M. Krauss and Glenn D. Starkman

Vision: A Window on Consciousness

In their search for the mind, scientists are focusing on visual perception--how we interpret what we see

By Nikos K. Logothetis

Flammable Ice

Methane-laced ice crystals in the seafloor store more energy than all the world's fossil fuel reserves combined. But these methane hydrate deposits are fragile, and the gas that escapes from them may exacerbate global warming

By Erwin Suess, Gerhard Bohrmann, Jens Greinert and Erwin Lausch

Slave-Making Queens

Life in certain corners of the ant world is fraught >with invasion, murder and hostage-taking. The battle royal is a form of social parasitism

By Howard Topoff

Time-Reversed Acoustics

Arrays of transducers can re-create a sound and send it back to its source as if time had been reversed. The process can be used to destroy kidney >stones, detect defects in materials and communicate with submarines

By Mathias Fink

The Grameen Bank

A small experiment begun in Bangladesh has turned into a major new concept in eradicating poverty

By Muhammad Yunus

Departments

  • From the Editor

    Who Wants to Live Forever?

  • Letters

    Letters

  • Erratum

  • Recommended

    The Editors Recommend

  • THE HINT HALF GUESSED

  • Anti Gravity

    Down in Front

  • 50, 100 & 150 Years Ago

    50, 100 and 150 Years Ago

  • Wonders

    The Surefire Résumé

  • In Brief

    IN BRIEF

  • Profile

    The Ascent of Scent

  • Mathematical Recreation

    Most-Perfect Magic Squares

  • Amateur Scientist

    Falling Into Chaos

  • Science and the Citizen

    SPEAKING UP FOR SCIENCE

  • FLORAL FIEND

  • A TASTE OF WEIGHTLESSNESS

  • QUANTUM CLAUSTROPHOBIA

  • MICKEY MOUSE, Ph.D.

  • By the Numbers

    Campaign Finance

  • Working Knowledge

    Toothpaste

  • Connections

    Various, Unrequited

  • Cyber View

    NO WAY TO RUN A NETWORK

  • Technology and Business

    MIND OVER MATTER

  • PORK PROGRESS

  • LITTLE BIG SCIENCE

  • In Focus

    THE INVISIBLE EPIDEMIC

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November 1999

See the World from a Different Perspective

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