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Could surrogacy save the northern white rhino?

Nola, one of the last remaining northern white rhinos has died in San Diego following surgery. Randy Rieches, curator of mammals at the San Diego Zoo Safari Park, tells us how a 'Frozen Zoo' could be the answer to preserving the species

(Photo credit: AP. Picture shows Nola, the 41 year old northern white rhino, who died on Sunday)

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2 minutes