The BBC's David Shukman explaining Higgs boson
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BBC's David Shukman explains the Higgs boson

13 December 2011 Last updated at 21:01 GMT

The most coveted prize in particle physics - the Higgs boson - may have been glimpsed, say researchers reporting at the Large Hadron Collider in Geneva.

The BBC's David Shukman explains exactly what the Higgs boson is.