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Features

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

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

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

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

Leafy Sea Dragons

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

By Paul Groves

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

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

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

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