Caloric Restriction and Aging
Eat less, but be sure to have enough protein, fat, vitamins and minerals. This prescription does wonders for the health and longevity of rodents. Might it help humans as well?
Volume 274, Issue 1
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Features
Technology and Economics in the Semiconductor Industry
Although the days of runaway growth may be numbered, their passing may force chipmakers to offer more variety
Neural Networks for Vertebrate Locomotion
The motions animals use to swim, run and fly are controlled by specialized neural networks. For ajawless fish known as the lamprey, the circuitry has been worked out
Cleaning Up the River Rhine
Intensive international efforts are reclaiming the most important river in Europe
The Evolution of Continental Crust
The high-standing continents owe their existence to the earth's long history of plate-tectonic actty
Working Elephants
They earn their keep in Asia by providing an ecologically benign way to harvest forests
Explaining Everything
The Real Threat of Nuclear Smuggling
Although many widely publicized incidents have been staged or overblown, the dangers of even a single successful diversion are too great to ignore.