Last common ancestor

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The Last Common Ancestor (or Latest Common Ancestor) is the ancient and probably unknown person who is included in the genealogy of all living human beings. Steve Olson, author of [i]Mapping Human History[link] (2002), maintains that the Latest Common Ancestor is no more than 2000 to 5000 years in the past. He further claims that all human beings share a common pool of ancestors at no more than 7000 years in the past. (Reference: http://news.yahoo.com/s/ap/20060701/ap_on_sc/brotherhood_of_man)

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