I have heard there is 11 Dimentions
It varies. I think it works pretty well with 11 though yeah.
lol I meant in physics, Steven Hawkins recons there are 11 dimentions in space, explaining why black holes can theoretically bend the time/space domain.
I know... My response was in terms of physics aswell... The maths behind String Theory works better or worse depending on how many dimensions you use, 11 is a good number, 23 is also good if I remember correctly.
Depending on how the strings were viewed (open, or closed etc.) altered the amount the dimensions, though the M theory (which i think acts as translator between all those string theory's) needs 11....or 23 as mentioned above....
HOWEVER, i might be full of shite.