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The Evolution of Galaxy Clusters

The most massive objects in the universe are huge clusters of galaxies and gas that have slowly congregated over billions of years. The process of agglomeration may now be ending

By Hans Bhringer, J. Patrick Henry and Ulrich G. Briel

Cloning for Medicine

Now that genetically modified and copied mammals are a reality, biomedical researchers are starting to develop imaginative ways to use this technology

By Ian Wilmut

Making Ultrabright X-Rays

Radiation a billion times brighter than the sun's is illuminating a host of scientific and technical phenomena

By Fred Schlachter, Jane Cross and Massimo Altarelli

Combating Prostate Cancer

Recent advances in diagnosis and treatment promise to extend survival time and improve the quality of life for many patients

By Marc B. Garnick and William R. Fair

Leafy Sea Dragons

These masters of camouflage are fierce predatorsand one of the few species in which males become pregnant

By Paul Groves

Building the Better Bug

Inserting new genes into a few specific insect species could stop some infectious diseases, benefit agriculture and produce innovative materials

By David A. O'Brochta and Peter W. Atkinson

Physicists in Wartime Japan

During the most trying years of Japan's history, two brilliant schools of theoretical physics flourished

By Laurie M. Brown and Yoichiro Nambu

Sizing Up Software

Unlike oil, steel or paper, software is an intangible commodity. This elusive quality makes computer programs difficult to quantify

By Capers Jones


  • From the Editor

    Counting Our Blessings

  • Letters

    Letters to the Editors, December 1998

  • Recommended

    Reviews and Commentaries: The Scientific American Young Readers Book Awards

  • Anti Gravity

    A Leg to Stand On

  • 50, 100 & 150 Years Ago

    50, 100 And 150 Years Ago: Opinion Polls, Cancer on the Rise and Irresistible Force

  • In Brief

    In Brief, December 1998

  • Profile

    Smashing through Science's Glass Ceiling

  • Mathematical Recreation

    Your Half's Bigger than my Half!

  • Amateur Scientist

    Sorting Molecules with Electricity

  • Science and the Citizen

    Andro Angst

  • Pioneering Gas Leak?

  • Leaping Leptin

  • The Population Slide

  • By the Numbers

    Human Rights throughout the World

  • Working Knowledge

    Working Knowledge--Parachutes

  • Connections

    Tea, Anyone?

  • Departments

    Annual Index 1998

  • Cyber View

    Hello, is this the Web?

  • Technology and Business

    Where no Brush can Reach

  • Shading the Twinkle

  • Beating the Tempest

  • Computing with Chaos

  • In Focus

    Nothing But Light

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