Wheredodogscomefrom?Graywolvesaretheirancestors.Scienti...
问题详情：Wheredodogscomefrom?Graywolvesaretheirancestors.Scientistsareprettyconsistentaboutthat.Andresearchershavesuggestedthatdogs’originscandatebacktoEurope,theNearEast,SiberiaandSouthChina.CentralA...