From this, it may be inferred that our ancestors walked upright for another reason.
They may have used their hands to carry food gathered for their offspring, and engaged in more elaborate cooperative behavior than one finds among creatures who walk on all fours.
So you not only have to take a lot of risks, but you really have to force yourself to be open-minded, and not be married to any one way of seeing things. I am very struck in reading about your achievements over the last 15 years or so, how early they came, relatively speaking, in your career.
No stone tools, not even fragments, have survived at the stratum where Lucy and her contemporaries were found.We have to be prepared to alter our views, to change or ideas, to make major changes in the way we view our own discipline.That was an extremely important learning experience for me.He divides his time between his homes in San Francisco and Tempe, Arizona.
When he was in high school, Donald Johanson was told by his guidance counselor to forget about going to college.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.