The northern white rhinoceros is one of the rarest animals on Earth, with only two known females remaining alive today. This subspecies, native to parts of Central and East Africa, is considered critically endangered, largely due to poaching and habitat loss. There are currently no living male northern white rhinos, making natural reproduction impossible. In response, scientists have turned to advanced reproductive technologies. Over a decade ago, cells from a deceased northern white rhino were preserved through a process known as biobanking, where biological material is frozen for future use. Researchers are now exploring the possibility of using these preserved cells to create embryos, which could then be implanted into surrogate mothers of closely related rhino species. This approach aims to increase the population and potentially save the subspecies from extinction. The project highlights the role of biobanking and reproductive science in conservation efforts for critically endangered animals.