Saying goodbye to a beloved pet is a heartbreaking moment for anyone, and perhaps more than anything underscores just how deeply we come to care for the animals in our lives. But what if it need not be a final goodbye? Science is making the idea of cloning your pet a reality and this week Luke explores the origins of the groundbreaking tech behind it, gives us some notable examples of animal cloning that have driven the science forward, and asks is there potential for this to  mean we will one day be replicating humans.

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