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While Johanson’s interpretation of his discoveries has provoked controversy in scientific circles, Johanson has become one of the dominant figures in the world of paleoanthropology, and his books and television appearances have given a mass audience a tantalizing glimpse of the mysterious origin of our species.

I suggested in the first paper I published that there were at least two different kinds of hominids at this site.

And, slowly this idea was eroded away, and I had to admit that what I had published was wrong. I think the big ones are one species and the little ones are another species. ” I had already prepared my list of answers before that question even came up.

We scientists, even though we think that we live in this ivory tower of truth, have to be prepared for the unanticipated.

And I very soon thereafter began an extensive period of research with my colleague Tim White.