Page last updated at 11:32 GMT, Thursday, 9 September 2010 12:32 UK

Is M-theory the theory of everything?

Science editor Susan Watts reports on the search for the elusive "theory of everything".

She asks how far scientists have got in the quest for the ultimate answer, and speaks to Professor Stephen Hawking as well as Eels frontman Mark Everett, aka E, who talks about the contribution of his physicist father, Hugh Everett III.

Read more: Are we closer to a 'theory of everything'?

First broadcast on Wednesday 8 September 2010.


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