Hominin evolution
Long periods of equilibrium punctuated by spurts of change. The theory of punctuated equilibrium as illustrated by the stepwise but inevitable change seen by the hominim.
Distribution of Hominin fossil species over time constructed using information contained in the illustration with the same name on the Human evolution page, supplemented and refined with information in Figure 10.12 on p. 294 of “The Story of Earth & Life” by Terence McCarthy and Bruce Rubidge (2005). Struik Publishers, Cape Town. ISBN 1 77007 148 2.