Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theo...

Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions.

quote by Edward Witten
Submitted by Lucian Velea
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