Accommodate Quote by Brian Greene

As you say, the way string theory requires all these extra dimensions and this comes from certain consistency requirements about how string should behave…

— Roger Penrose

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…

— Edward Witten

One of the strangest features of string theory is that it requires more than the three spatial dimensions that we see directly in the…

— Brian Greene

If I take the theory as we have it now, literally, I would conclude that extra dimensions really exist. They're part of nature. We…

— Edward Witten

As of now, string theorists have no explanation of why there are three large dimensions as well as time, and the other dimensions are…

— Edward Witten

“For string theory to make sense, the universe should have nine spacial dimensions and one time dimension, for a total of ten dimensions.”

— Brian Greene

“I think string theory provides an explanation.” “Some think that it is only when two strings encounter each other and some qualities are canceled…

— Liu Cixin

String theories, for instance, they require seven additional dimensions. So, as experimentalists we should, with our high-tech instruments like the Large Hadron Collider, just…

— Fabiola Gianotti

“Extending Polyakov's argument, he found evidence that the string theory describing those emergent strings is actually a ten-dimensional supersymmetric string theory. Of the nine…

— Lee Smolin

In many ways, string theory attempts to go beyond Einstein's dream... an all-encompassing description of nature that works at large distances where gravity becomes…

— Ashoke Sen

Extra dimensional theories are sometimes considered science fiction with equations. I think that's a wrong attitude. I think extra dimensions are with us, they…

— Leonard Susskind

The theory has to be interpreted that extra dimensions beyond the ordinary four dimensions the three spatial dimensions plus time are sufficiently small that…

— Edward Witten