books.google.ca - Where did the first humans originate? How and when did humans get onto North America, the tip of South America, and Australia? Was there a single human ancestress whose mitochondria survive within us today? Because history cannot be repeated, we may never have answers to these far-reaching questions....http://books.google.ca/books/about/The_great_human_diasporas.html?id=ApuuiwUkEZ0C&q=century&utm_source=gb-gplus-shareThe great human diasporas
