english: Well, it turns out that Einstein and Kaluza and many others worked on trying to refine this framework and apply it to the physics of the universe as was understood at the time, and, in detail, it didn't work.
non_english: Pa, ispostavlja se da su Ajnštajn i Kaluza i mnogi drugi radili na usklađivanju ove ideje i njenoj primeni u fizici tog vremena, odnosno tadašnjem razumevanju univerzima i u detaljima, ona nije radila.