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Alreadychargedwith eradicating mammoths , the first North Americans might also have wipe out wildhorsesin Alaska , a new subject area suggests .
The end of thePleistocene geological era , around 12,000 years ago , was couple with a global cooling upshot and the quenching of many large mammal , peculiarly in North America .
Humans Might Have Wiped Out Wild Horses
This was also when humans firstmade their wayinto Alaska from Asia , leading some researcher to believe that extensive over - hunt helped drive the extermination of the massive beast . mammoth , for instance , were aprime targetof former hunters and were driven to experimental extinction within some 500 age of humankind ' arrival on the continent .
But another theory is that a fast - spread infective disease brought down these and other animals .
sawbuck history
Horses originated in North America , but all the wild ones were kill by former hunters , investigator say . Some horses snuck over to Asia before the land / water ice bridge disappeared . Those were domesticated by Asians and then Europeans , who reintroduced horses to the Americas .
In late times , Americans had large horse - raising cattle farm , and some of the horses hightail it to become what are today have sex as " wild"mustangs .
Since the most recent genuinely wild horse fossil dates to about 12,500 age ago , scientists had thought these animals die out before human race were a element .
revise history
In the novel study , investigator reevaluated some of the undependable data used in previous calculations and determined that when spread in the fossil track record and radiocarbon go steady errors are factored in , it is possible that humans and horses coexist .
" The fossil record ’s very incomplete , and just because the most recent continue is from 12,500 years ago , that does n’t mean that the horse became extinct at this time , " aver study co - generator Andrew Solow of Woods Hole Oceanographic Institute .
Radiocarbon date stamp techniques — the most uncouth method acting of determining the years of constitutive material — can be off by 200 to 300 class , a important error when considering a thousand - class window .
As a answer , it is unacceptable to predominate out human hunt as the cause , or major contribute factor , to buck extinction in North America , Solow toldLiveScience .
The study is detail in online edition of the daybook theProceedings of the National Academy of Sciences .
