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Editor's choice

Jan 19, 2014

A special free-to-read digital edition containing 10 of our very best feature articles on the science and applications of light

Opinion: February 2009

The nuclear threat: a new start

As US President Barack Obama takes office, his leadership will be needed to reduce the dangers of the world’s nuclear weapons and to stop nuclear materials from falling into rogue hands, argues Sidney Drell

Journeys to greatness

To practising physicists, the great equations of physics might seem obvious, logical and trivial. But to their discoverers, Robert P Crease argues, that was far from true