The race is on to help the critically endangered animals have a fighting chance of survival through cutting-edge advances in the lab. The world’s last two northern white rhinos, Fatu and Najin, are both female. This means that the critically endangered subspecies can no longer reproduce naturally and so extinction for the rhinos is looming with each passing day. The race is on, however, by international teams of scientists to harness the benefits of modern science and help the rhinos have a fighting chance of survival through cutting-edge advances in the lab. In one method being explored scien…