<prompt> Mamwe ma speculative theories akafunga kuti kune chisimba chechishanu chinotsanangura zvakasiyana-siyana zvisingaenderani nema theory aripo. Zvimiro zvechisimba chechishanu ichi zvinoenderana nedzidziso iri kufambiswa. Vazhinji vanofungidzira simba rinenge simba rekukweva i.e. rakanyanya kusimba kupfuura electromagnetism kana masimba enyukireya aine huwandu hwechero kupi kubva pasi pemamirimita kusvika kune cosmological zviyero. Chimwe chikumbiro isimba idzva risina simba, rinopindirwa neW uye Z bosons. Mubvunzo: Ndechipi chiitiko chechisikigo chinofananidzwa nechisimba chechishanu?  <response>: simba rinokweva 