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The Power of Maps

The authoritative appearance of modern maps belies their inherent biases. To use maps intelligently, the viewer must understand their subjective limitations

By Denis Wood

The Neurobiology of Fear

Researchers are beginning to tease apart the neurochemical processes that give rise to different fears in monkeys. The results may lead to new ways to treat anxiety in humans

By Ned H. Kalin

The Core-Mantle Boundary

This interactive zone may be the most dynamic part of the planet, directly affecting the earth's rotation and magnetic field

By Raymond Jeanloz and Thorne Lay

P.A.M. Dirac and the Beauty of Physics

He preferred the beautiful theory to the fact-buttressed ugly one because, as he noted, facts change. He proved his point by predicting the existence of antimatter

By R. Corby Hovis and Helge Kragh

Intelligent Gels

Soft aggregations of long-chain molecules can shrink or swell in response to stimuli. They may form the basis of a new kind of machine

By Yoshihito Osada and Simon B. Ross-Murphy

Inconstant Cosmos

Space-based telescopes endowed with x-ray and gamma-ray vision observe an ever restless, dynamic universe.

By Corey S. Powell,

How Cells Respond to Stress

During emergencies, cells produce stress proteins that repair damage. Inquiry into how they work offers promise for coping with infection, autoimmune disease and even cancer

By William J. Welch


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