Study Materials on Evolutionary Biology

This Great Tree of Life diagram is based primarily on the evolutionary relationships so wonderfully related in Dr. Richard Dawkins' The Ancestor's Tale. The smallest branches are purely illustrative; they are intended to suggest the effect of mass extinctions on diversity, and, on a few of the branches, changes in diversity through time. The diagram mainly tries to illustrate a great lesson of evolution; that we are related not only to every living thing, but also to every thing that has ever lived.