You may have already heard about the rhino named Sudan.
He's one of four northern white rhino left in the world, and the last male of his species.
Now with the recent death of a northern white rhino in Czech Republic's Dvůr Králové Zoo the extinction of the northern white rhino is a very real and very imminent probability.
None of the four are capable of natural reproduction, which is why it is imperative that we develop a technique for rhino IVF and embryo transfer that can be funded, developed, tested and implemented in time.
Three of the last northern white rhino reside in Ol Pejeta Conservancy in Kenya, which is partnering with Dvůr Králové Zoo and other organizations to try and develop a way to safely remove egg cells from remaining females, fertilize these with semen collected from northern white males, and use a female southern white rhino as a surrogate.
This has never been done before, and does not come without risks. What's more, if the remaining females die before this method has been developed, one of the last chances to save the northern white rhino will vanish.