Ibisobanuro ahagana hasi ku ipaji

a Mu gitabo Charles Darwin yanditse, yaravuze ati “kugira ngo ikinyabuzima kigire ubushobozi bwo kwihanganira imimerere y’aho kiba, cyifashisha ihinduka ryoroheje ariko ribaho mu byiciro bikurikirana. Nticyagira ubwo bushobozi mu gihe hari icyiciro . . . cyasimbutswe.”​—Origin of Species.