Postscript
It can certainly be said that we humans are special relative to past and present species. We have changed the world in both wonderful and terrible ways. Let us hope that (1) we can understand and appreciate our common origin as well as our cultural and physical differences so that we can live together as a global community; (2) we continue to advance technologically in order to correct the problems, afflictions, and mistakes of the past, present, and future; and (3) our time on earth will continue so that we do not become just another extinct hominin in the fossil record