For over 20 years, Thomas Hildebrandt has harboured a dream: to save the northern white rhinoceros, the world’s rarest large mammal. Facebook Twitter Pinterest Prof Thomas Hildebrandt at work in his lab. Photograph: Kate ConnollySudan did not live to see another northern white rhino being born, despite efforts to mate him in Kenya with southern white rhinos to at least produce a hybrid. Play Video 0:50 Sudan, the world's last male northern white rhino, dies – video reportFollowing the death of Sudan, the rhinos are uppermost in his mind. They will then be implanted in southern white rhino surrogates – neither Fatu nor Najin are able to carry calves themselves – in the hope they will carry them to full term.

Source: The Guardian March 23, 2018 14:58 UTC