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The Loves of the Plants

Carl Linnaeus classified plants according to their reproductive parts, endowing them as well with sex lives reflecting 18th-century values and controversies

By Londa Schiebinger

The Global Positioning System

Two dozen satellites hovering thousands of miles out in space are allowing people to locate themselves on the earth's surface with remarkable precision

By Thomas A. Herring

The Bacteria Behind Ulcers

One half to one third of the world's population harbors Helicobacter pylori, "slow" bacteria that infect the stomach and can cause ulcers and cancer there

By Martin J. Blaser

Seeing Underwater with Background Noise

With a technique called acoustic-daylight imaging, sounds in the sea can "illuminate" submerged objects, thereby creating moving color pictures without sonar

By Michael J. Buckingham, John R. Potter and Chad L. Epifanio

Quarks by Computer

Yearlong computations have helped to confirm the fundamental theory behind quarks -- and, using its principles, even to identify a new particle

By Donald H. Weingarten

Malnutrition, Poverty and Intellectual Development

Research into childhood nutrition reveals that a poor diet influences mental development in more ways than expected. Other aspects of poverty exacerbate the effects

By J. Larry Brown and Ernesto Pollitt

Colossal Galactic Explosions

Enormous outpourings of gas from the centers of nearby galaxies may ultimately help explain both star formation and the intergalactic medium

By Sylvain Veilleux, Gerald Cecil and Jonathan Bland-Hawthorn


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