“There used to be a time when extinction meant for ever，but no more，” said Professor Mike Archer.“We are now able to seriously challenge whether those animals that have gone have gone for ever.What has been achieved is a very important step in bringing back those animals that are extinct and while I think that technically it is still pretty difficult at the moment，we can now see the possibilities.I'm personally convinced that the Tasmanian tiger will be brought back to life in my lifetime.”

　　The breakthrough came after nine years of experiments by scientists at the University of Melbourne，who extracted a gene from one of several tigers preserved in alcohol in a Melbourne museum.

　　They removed the equivalent gene from a mouse embryo

　　(胚胎)ched as the mouse continued to grow normally，suggesting the tiger gene had been activated.

　　Team leader Dr Andrew Pask said it was the first time DNA from an extinct species had been used to “induce a functional response in another living organism”．

　　However，the animal's entire gene structure would have to be revived in the same way to even begin the possibility of bringing the Tasmanian tiger back from the dead.

　　Mick Mooney，a wildlife officer with the Tasmanian Government，was

　　worried

　　that

　　such

　　developments

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