Edited sentence: "I remember well the time when the thought of the eye made me cold all over, but I have got over this stage of the complaint, and now small trifling particulars of structure often make me very uncomfortable."If it could be demonstrated that any complex organ existed which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down."The geological record is extremely imperfect and this fact will to a large extent explain why we do not find intermediate varieties, connecting together all the extinct and existing forms of life by the finest graduated steps.- Letter to Asa Gray, dated 3 April 1860,.- The Origin of Species.- cited in Michael Behe, Darwin's Black Box.- cited in Of Pandas and People....[T]he number of intermediate varieties, which have formerly existed on the earth, [must] be truly enormous.Geology assuredly does not reveal any such finely graded organic chain; and this, perhaps, is the most obvious and gravest objection which can be urged against my theory.He who rejects these views on the nature of the geological record, will rightly reject my whole theory.The Life and Letters of Charles Darwin.The sight of a feather in a peacock's tail, whenever I gaze at it, makes me sick.Why then is not every geological formation and every stratum full of such intermediate links