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Smart Sensors to Network the World

An emerging class of pillbox-size computers, outfitted with sensors and linked together by radios, can form perceptive networks able to monitor a factory, a store--even an ecosystem. Such devices will more intimately connect the cyberworld to the real world

By David E. Culler and Hans Mulder

Saturn at Last!

After a seven-year journey, the Cassini-Huygens spacecraft is preparing to unveil the mysteries of Saturn, its rings and its giant moon, Titan

By Jonathan I. Lunine

Nuclear Explosions in Orbit

The spread of nuclear weapons and ballistic missiles raises fears of atomic attacks on the global satellite system

By Daniel G. Dupont

Nanotechnology and the Double Helix

DNA is more than just the secret of life--it is also a versatile component for making nanoscopic structures and devices

By Nadrian C. Seeman

Lessons from the Wolf

Bringing the top predator back to Yellowstone has triggered a cascade of unanticipated changes in the park's ecosystem

By Jim Robbins

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