String theory requires ten (or eleven for M-theory) extra dimensions. These dimensions are not observed at large scales and so it has been hypothesised that they are curled up and invisible at larger scales. Often times the example of an ant on a lamppost is given. To the ant, the space is two-dimensional (up/down and around) but to an outside observer it appears to have just one dimension (up/down).

Have any experiments been conducted to find these extra dimensions and down to what size have they excluded/failed to find the existence of these dimensions?


1 Answer 1


Roughly $10^{-19}$ meters.

http://arxiv.org/abs/1012.3375 , Search for Microscopic Black Hole Signatures at the Large Hadron Collider

Mureika et al, http://arxiv.org/abs/1111.5830 , Any black holes at the LHC?

  • $\begingroup$ Please add further details to expand on your answer. $\endgroup$
    – Community Bot
    Aug 28, 2021 at 15:01

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.