Share on Facebook Share on Twitter Share via Email Print this Page [1-1] of 1Posts from T. McKinney, DublinT. McKinney, Dublin Reply T. McKinney, Dublin 7/5/10 re: Charles Darwin quote Did you know that the eye has 40,000,000 nerve endings, the focusing muscles move an estimated 100,000 times a day, and the retina contains 137,000,000 light sensitive cells? SaveOk2 Share on Facebook Tweet Email Print