Having those extra dimensions and therefore many ways the string can vibrate in many different directions turns out to be the key to being able to describe all the particles that we see.

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• Edward Witten:

  I wouldn't have thought that a wrong theory should lead us to understand better the ordinary quantu

• Edward Witten:

  If I take the theory as we have it now, literally, I would conclude that extra dimensions really ex

• Edward Witten:

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• Edward Witten:

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• Edward Witten:

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• Edward Witten:

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• Edward Witten:

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• Edward Witten:

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