AhandfulofscientistsaroundtheUnitedStatesaretryingtodosomethingthatsomepeoplefinddisturbing:makeembryosthatareparthuman,partanimal.
Theresearchershopetheseembryos,knownaschimeras,couldeventuallyhelpsavethelivesofpeoplewithawiderangeofdiseases.
Onewaywouldbetousechimeraembryostocreatebetteranimalmodelstostudyhowhumandiseaseshappenandhowtheyprogress.
Perhapstheboldesthopeistocreatefarmanima...[
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