How surrogate mums could save this rhino species

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There are only two northern white rhinos left in the world, but both are female. As they cannot naturally reproduce, vets in Kenya have created 3 northern white rhino embryos that they will implant into females of another rhino species, which will act as a surrogate. Jan Stejskal is coordinating the project and tolds BBC OS how this procedure may save the species from extinction. (Photo: The last two northern white rhinos. Credit: Ami Vitale)