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Can we clone a woolly mammoth? How about T-rex?

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Can we clone a woolly mammoth? How about T-rex? What extinct animals is it possible to clone back into existence? <script height="393px" width="700px" src=" http://player.ooyala.com/iframe.js#pbid=7dfd98005dba40baacc82277f292e522&ec=RtYW1kcTrqZjdE-uMcJPCI9_H2LFE2ZS" ></script> By Tom Chivers 11:56AM GMT 17 Nov 2014 The news that South Korean scientists are planning to clone a mammoth , using the DNA of a particularly well-preserved specimen in the Siberian permafrost, has reignited the debate over the ethics of cloning. But whether or not it's right, could it happen? And what other animals could, or couldn't, we clone? Mammoth   A woolly mammoth. (Photo: Alamy) It may be possible to clone a mammoth. It would be an enormous technical challenge, because the freezing process which preserves the dead animals also tears up the cells. Normal cloning techniques - such as that which produced Dolly the Sheep - involve taking the whole ...