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AhandfulofscientistsaroundtheUnitedStatesaretryingtodosomethingthatsomepeoplefinddisturbing:makeembryosthatareparthuman,partanimal. Theresearchershopetheseembryos,knownaschimeras,couldeventuallyhelpsavethelivesofpeoplewithawiderangeofdiseases. Onewaywouldbetousechimeraembryostocreatebetteranimalmodelstostudyhowhumandiseaseshappenandhowtheyprogress. Perhapstheboldesthopeistocreatefarmanima...[阅读全文]
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