Donald Johanson : (3) " Lucy brought with her an image of our human ancestors that you don’t get when you find a jaw or an arm bone or a leg bone. Here was 40 percent of a single skeleton. " - Donald Johanson " I think that many of my ideas are correct, but I’ll bet you, before my death other discoveries will be made that will prompt me to alter various ideas I have about human evolution. " - Donald Johanson " When I realized, in 1978, that Lucy did represent a new species of human ancestor, and that I had an opportunity to name this new species, I realized this was a revolutionary step in understanding human origins. " - Donald Johanson