Hybridism : Darwin
Source: http://www.talkorigins.org/faqs/origin/chapter8.html The Origin of SpeciesChapter 8: Hybridism by Charles Darwin he view generally entertained by naturalists is that species, when intercrossed, have been specially endowed with the quality of sterility, in order to prevent the confusion of all organic forms. This view certainly seems at first probable, for species within the