There are only two northern white rhinos left in the world, but scientists have successfully created two embryos.
Fatu and Najin - the last two northern white rhinos are both female and cannot carry a pregnancy. The last male passed away last year.
The embryos were created with Fatu and Najin's eggs and frozen sperm from dead males. The embryos will be transferred into a female southern white rhino as a surrogate mother in the near future.
Scientists say this is a crucial turning point in the race to save this species from extinction.
"Five years ago it seemed like the production of a northern white rhino embryo was (an) almost unachievable goal -- and today we have them," they said.