摘要
在全球的北部白犀牛只剩下两头之际,一些研究者们已经成功地培育出第三个北部白犀牛的胚胎,这些研究者们还将继续为培育北部白犀牛的胚胎而努力。
Researchers say they have successfully created another embryo of the northern white rhino.The animal risks disappearing forever.Just two remain,and both are female.This new viable embryo is the third of its kind.To make the embryo,scientists used eggs from one of the surviving females.They inseminated the eggs with frozen cells from dead males.The embryos are stored in a cool liquid that protects them.They will be put into a surrogate mother—a southern white rhino—in the coming months.
