Behave Quote by Roger Penrose

String theory is not the only theory that can accommodate extra dimensions, but it certainly is the one that really demands and requires it.

— Brian Greene

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

“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

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

“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

Having those extra dimensions and therefore many ways the string can vibrate in many different directions turns out to be the key to being…

— 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

“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

We do not know how to formulate string theory nor do we know its underlying principles. Surprisingly, this fact does not stop us from…

— Nathan Seiberg

The basic theory in twistor theory is not to add extra dimensions.

— Roger Penrose

If string theory is a mistake, it's not a trivial mistake. It's a deep mistake and therefore kind of worthy.

— Lee Smolin

I'd say many features of string theory don't mesh with what we observe in everyday life.

— Brian Greene