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Transgenic Crops

Biotechnology has already created plants that withstand pests and fruits that resist spoilage. Recent advances confirm its environmental soundness and commercial viability

By Charles S. Gasser and Robert T. Fraley

The Codex Mendoza

This magnificent pictorial book, compiled by Aztecs at the instigation of their Spanish conquerors, constitutes an eyewitness account of a rapidly vanishing civilization

By Frances F. Berdan and Patricia Rieff Anawalt

Single Electronics

Is electric current the motion of individual electrons or the continuous flow of a fluid of charge? Recent experiments confirm both ideas and may lead to novel electronic devices

By Konstantin K. Likharev and Tord Claeson

Redesigning Research

As U.S. spending on industrial research and development flags, a few companies are trying to invent new rules.

By Elizabeth Corcoran

Lipoprotein (a) in Heart Disease

A remarkable protein that transports cholesterol and binds with blood clots can raise the risk of a heart attack. Comparisons between it and other blood proteins may explain why

By Richard M. Lawn

Control of Rabies in Wildlife

A revolutionary approach now being tested in Europe and North America is the offspring of a research effort that began modestly in an Atlanta laboratory some 30 years ago

By Konrad Bgel and William G. Winkler

Accounting for Environmental Assets

A country can cut down its forests, erode its soils, pollute its aquifers and hunt its wildlife and fisheries to extinction, but its measured income is not affected as these assets disappear. Impoverishment is taken for progress

By Robert Repetto


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