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Strange Genius: The Life and Times of Paul Dirac

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Download a free PDF of the October 2009 issue

In depth: June 2009

Features

The unique universe

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Many cosmological theories not only see our universe as one of many but also claim that time does not exist. Lee Smolin argues against the timeless multiverse

Opinion

The power of robotics

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Robotics competitions supply a vital missing link in science and engineering education, says Robert P Crease