Alva Review-Courier -

BERLIN (AP) — Scientists say they're several steps closer to perfecting a method that could prevent the extinction of northern white rhinos, of which only two animals are known still to be alive.

According to a paper published Wednesday in the journal Nature Communications, researchers have succeeded in creating embryos using frozen northern white rhino sperm and eggs from a southern white rhino, a closely related sub-species.

It's the first time such hybrid embryos have been created and the scientists from Germany, Italy and the Czech Republic say it could provide a pathway to saving the crit...