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The Workings of an Ancient Nuclear Reactor

Two billion years ago parts of an African uranium deposit spontaneously underwent nuclear fission. The details of this remarkable phenomenon are just now becoming clear

By Alex P. Meshik

Crossbar Nanocomputers

Crisscrossing assemblies of defect-prone nanowires could succeed today's silicon-based circuit

By Philip J. Kuekes, Gregory S. Snider and R. Stanley Williams

The Neurobiology of the Self

Biologists are beginning to tease out how the brain gives rise to a constant sense of being oneself

By Carl Zimmer

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November 2005

See the World from a Different Perspective

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