tag:blogger.com,1999:blog-1396682199178122530.post1003364314653059026..comments2023-12-28T22:22:42.307-08:00Comments on Nobody In Particular: Variation Under NatureAaronhttp://www.blogger.com/profile/03128359303310478673noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-1396682199178122530.post-15011872777273719392007-10-02T12:52:00.000-07:002007-10-02T12:52:00.000-07:00One of the many things that has changed since Darw...One of the many things that has changed since Darwin's time is the definition of "species." Although it is still somewhat blurry, we have a much better idea of what constitutes a species now than 150 years ago. The evolutionary biology pioneer Ernst Mayr defined a species as a group of similar organisms which shares a gene pool and can only successfully breed within the group. No one today would claim that various groups of geese were separate species based simply on differences in habitat.Archaeopteryxhttps://www.blogger.com/profile/10627784327758008867noreply@blogger.com