San Diego Zoo is attempting to prevent extinction.
NAIROBI, Kenya (AP) -- The world's last male northern white rhino died Monday in Africa, putting the species closer to extinction.
The rhino, named "Sudan" died of age-related complications. He was living under armed guard at a preserve in Kenya to keep poachers at bay.
Two female northern white rhinos are all that are left of the subspecies of white rhinoceros.
10News has been covering the San Diego Zoo's effort to save the species for the past three years.
Biologists will be using genetic material to impregnate the park's southern white rhinos with northern white rhino embryos.