” he says.

    itists urned increasingly to genetic studies,in particular t knoococ by t ty of California at Berkeley  it ures t lend it a particular convenience as a kind of molecularclock: it is passed on only t doesn’t become scrambled ernal DNA ion, and it mutates about ty times faster t easier to detect and folloic patterns over time. By tracking tes of mutation t tic ory and relationships of whole groups ofpeople.

    In 1987, team, led by te Allan ilson, did an analysis of mitoc tomically modern  140,000 years and t “all present-day  population.” It o tiregionalists. But to look a little more closely at ta. One of t extraordinary points—almost too extraordinary to credit really— tudy ually African-Americans, o considerablemediation in t fe tesof mutations.

    By 1992, tudy ed. But tecic analysiscontinued to be refined, and in 1997 scientists from ty of Municoextract and analyze some DNA from tal man, and time tood up. tudy found t tal DNA rongly indicating t tic connection betals and modern o multiregionalism.

    1One possibility is t Neandertals and Cro-Magnons  numbers of ciont commonly arises  not quite identical conjoin. In te t an offspring ively useless number of c, a sterile mule.

    te 2000 Nature and otions reported on a Socy-ted t all modern  100,000 years and came from a breeding stock of no more teror of teitute/Massacts Institute of tecer for Genome Researcmodern Europeans, and per tly as 25,000 years ago.”

    As legenetic variability