The study, published in the Journal of High Energy Physics in November, proposes that the enigmatic behavior of neutrinos could be explained if, in addition to the familiar three dimensions of space, ...

in addition to the familiar three dimensions of space, there exist extra spatial dimensions on the scale of micrometers (millionths of a meter). While tiny by everyday standards, such dimensions ...

String theorists are betting that extra dimensions do indeed exist ... To extend the curled-up space to include these added dimensions, imagine that spheres replace the Kaluza-Klein circles.