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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

Preparing for a Pandemic

One day a highly contagious and lethal strain of influenza will sweep across all humanity, claiming millions of lives. It may arrive in months or not for years--but the next pandemic is inevitable.Are we ready?

By W. Wayt Gibbs and Christine Soares

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

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