A mammoth task: Scientists are reviving endangered animals, and awakening ethical questions
The next big thing in cloning is 'de-extinction' - reviving endangered species by creating hybrids that fuse a threatened or extinct animal with one that is thriving.
In the 1960s, the world population of the northern white rhinoceros numbered more than 2,000. At present, there are only seven left in the world: two in the San Diego Zoo Safari Park; one in the Dvur Kralove Zoo in the Czech Republic; and four in the Ol Pejeta Conservancy in Kenya. The last birth of a northern white rhino occurred in the year 2000. Since then, none of the rhinos has...
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