Full Idea
String theory needs at least 10 space-time dimensions to be mathematically consistent.
Gist of Idea
String theory needs at least 10 space-time dimensions
Source
New Scientist writers (New Scientist articles [2013], 2013.06.15)
Book Reference
-: 'New Scientist magazine' [ 2013], p.36
A Reaction
Apparently because of 'Ads/CFT', it may be possible to swap this situation for a more tractable 4-dimensional version.