His subject is the "Origin of Species," & not the origin of Organization; & it seems a needless mischief to have opened… — Harriet Martineau Copy Share Image
Each species may have had its origin in a single pair, or individual, where an individual was sufficient, and species may have… — Charles Lyell Copy Share Image
The fundamental problem in the origin of species is not the origin of differences in appearance, since these arise at the level… — David Lack Copy Share Image
