Natural Selection (Deno)

NOTE: The browser version may fail to run and I dont know the reason... Please use the download version. If during the long course of ages and under varying conditions of life, organic beings vary at all in the several parts of their organisation, and I think this cannot be disputed if there be, owing to the high geometrical powers of increase of each species, at some age, season, or year, a severe struggle for life, and this certainly cannot be disputed then, considering the infinite complexity...