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An Iron Key to High-Temperature Superconductivity?

The discovery that compounds known as iron pnictides can superconduct at 50 degrees above absolute zero has reignited physicists' quest for better high-temperature superconductors, and may offer clues to unlocking a 20-year mystery...

By Graham P. Collins

Is There a Place for Nuclear Waste?

Yucca Mountain was supposed to be the answer to the U.S.'s nuclear waste problem, but after 22 years and $9 billion, that vision is dead. Now, some say that doing nothing in the near term may be the smartest solution...

By Matthew L. Wald

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