Izikulufu zamarola eplanethi ziguqula ukunyakaza okujikelezayo kube ukunyakaza okuqondile.Iyunithi yokushayela iyirola phakathi kwesikulufu namantongomane, umehluko omkhulu ngezikulufu zebhola ukuthi iyunithi yokudlulisa umthwalo isebenzisa i-roller enentambo esikhundleni sebhola.Izikulufu zamarola eplanethi zinamaphuzu amaningi okuxhumana futhi zingamelana nemithwalo emikhulu ngokulungiswa okuphezulu kakhulu.