Biotechnology has already created plants that withstand pests and fruits that resist spoilage. Recent advances confirm its environmental soundness and commercial viability
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
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
As U.S. spending on industrial research and development flags, a few companies are trying to invent new rules.
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
Early Results from the Hubble Space Telescope
Although hampered by optical and mechanical flaws, Hubble has relayed a plenitude of eye-opening images and revealing spectral portraits of cosmic objects
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
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
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