Eventually theybecometoosmalltoreassemble,andall information is lost."Thereseemstobeatimehorizonof100,000years or so undermost preservation conditions duringwhich intactDNA survives,"Green says. As it ages, its long strands shred into ever smaller pieces. Somethingaboutthenatureofpastpeoplespossiblyevenwhattheylookedlike.Ancienthumangenomescouldgiveusinsightsintotheevolutionofourownspecies,explainingwhengenesinvolvedindiseaseandhighercognitiveskillsemerged.īut DNA is not forever. If these genomesevermaterializeandthat'sabigiftheycouldleadtoabetterunderstandingofhowdifferenthominidspeciesarerelated,andwhenandwheretheybranchedoff.Ifthegeneticinformationisgoodenough,itmaytellus "Wearebasically startingon it rightnow,"he says.
Ifwellpreserved bones can be found, a genomemight be possible,Willerslev says.Willerslev's laboratory has just received bones from Spain belonging to Homo heidelbergensis, thepredecessor toNeanderthals.
Neanderthalsarenot theonlyhominidswhosegenomes couldbe sequenced, saysWillerslev.Homoerectus, a species that emerged inAfrica about 2million years ago, survived in eastAsia until less than100,000 years ago. GunakanPETUNJUKAuntukmenjawabsoalnomor31sampaidengannomor45! Text1ThefirstancientDNAsequencestobegathered3400basepairsfroma2400yearoldEgyptianmummywereaproofofprinciple.AfullgenomesequencewouldbefarmoreinformativeperhapsexplainingwhatkilledKingTut,forinstance.Atpresent,Inuk'sistheonlypublishedancienthumangenome.However,a team led by Svante Paabo and EdGreen at theMax Planck Institute for EvolutionaryAnthropology inLeipzig, Germany, will soon publish the complete genome sequence combined together from severalNeanderthals,frombetween38,000and70,000yearsago.
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