ABSTRACT
Our actual beginning as a species is lost in the mists of time. However, as we gaze backward toward our origins, we see some clues as to why and how we are now as we are. Usually the attempts to picture our evolution are restricted to physical form, mostly because it is only the bony structures and stony artifacts of some of our precursors that remain. From those hard objects, we derive stories of our beginnings. Rarely do we take another approach—first trying to imagine the behavior of our precursors and then speculating on how their form was determined by their behavior.
