Board Thread:Writer's Workshop/@comment-37554505-20181121225755/@comment-35711173-20181123193510

While the fourth dimension is commonly expressed as time, string theory does hold that there are many additional dimensions, from 10 to 26 in fact.

https://en.wikipedia.org/wiki/String_theory

There, that should provide you with the blah blah for higher dimensions with full scientific justification.