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Do you remember Dolly the Sheep? Dolly made world headlines in 1997, as it was the first time scientists had created a genetically identical copy of a mammal from a sample of their adult tissue.

Some thought Dolly would herald a brave new world of extraordinary genetic feats – cloned humans, extinct species brought back to life, and people “resurrecting” beloved pets that had died. New Feature

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Probably for the best, the first two goals turned out to be a lot harder to achieve than we thought and are still

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