All hopes to save the northern white rhino from getting extinct are now stuck on Sudan, the last northern white rhino on earth. But problems do not end there, as Sudan is 42-years-old, which means that it is an old animal and his sperm count is lowering.

Sudan's legs are becoming weak, which means that it may not be able to mount a female. Authorities concerned know its worth and this is the reason that it remain under constant protection at Ol Pejeta conservancy in Kenya's Laikipia.

CEO Richard Vigne said that as far as rhinos are concerned, Sudan is an old animal and will die soon. If it dies then it will be the end of the species, meaning extinction. It was born in Sudan and then was taken to a zoon in the Czech Republic.

As a part of 'Last Chance to Survive' Breeding programme, Sudan was taken to Kenya in 2009. In 2014, the only other male, Suni, died, making all the hopes attached to Sudan only. "It really came to a head with the death of Suni last year, the other remaining male northern white rhino - he was much younger than Sudan", said Richard.

He affirmed that there are very little success chances at breeding northern whites in captivity. If natural way fails then Richard thinks that artificial methods could save the sub-species. Therefore, the team has been southern white rhinos as surrogates to carry northern white fertilized eggs to come up with a pure bred northern white calf.