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Last Updated: Friday, 20 January 2006, 11:16 GMT
Before the Big Bang

Sir Roger Penrose has developed a new theory on what happened before the Big Bang.

Stephen Sackur talks to Sir Roger Penrose about his latest theory on what may have existed before the Big Bang.

The universe began with a big bang.

That's the most popular, though by no means the unanimous view of the world's leading physicists.

Sir Roger Penrose has devoted his life to the biggest questions; from the origins of the universe to human consciousness.

Stephen Sackur asks if his latest theory is perhaps a step too far?

HARDtalk can be seen on BBC World at 04:30 GMT, 0830 GMT, 1130 GMT, 1530 GMT, 1930 GMT, 0030 GMT

It can also be seen on BBC News 24 at 04:30 and 23:30



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